workshop docs: add gh-aw doc links (batch 2) (#1728)

- 05-agentic-workflows-intro.md: link tools, frontmatter, triggers, permissions, Lock file, Engine
- 06-install-gh-aw.md: link agentic workflow, lock file
- 06a-install-terminal.md: link agentic workflow
- 06b-install-local.md: link agentic workflow
- 04-github-actions-intro.md: link tools

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Co-authored-by: Peli de Halleux <pelikhan@users.noreply.github.com>

Author: 3 people

workshop/04-github-actions-intro.md

@@ -27,7 +27,7 @@ If you already know Actions, here's the key shift at a glance:
 |-----------|-----------------|-------------------|
 | **Task description** | You write YAML `steps` | You write a plain-English brief |
 | **Execution model** | Deterministic — same inputs, same path | AI agent reasons and adapts at runtime |
-| **Tool selection** | Fixed — you specify every `uses` and `run` | Agent selects and chains tools from declared toolsets |
+| **Tool selection** | Fixed — you specify every `uses` and `run` | Agent selects and chains [tools](https://github.github.com/gh-aw/reference/tools/) from declared toolsets |
 | **File format** | `.github/workflows/*.yml` | `.github/workflows/*.md` (compiled to `.lock.yml`) |
 
 ## Quick Refresher

workshop/05-agentic-workflows-intro.md

@@ -15,7 +15,7 @@ If both apply, [Skip to Install gh-aw](06-install-gh-aw.md).
 
 - You've read [What Are GitHub Actions?](04-github-actions-intro.md)
 
-An [**Agentic Workflow**](https://github.github.com/gh-aw/introduction/overview/) is a plain-English task brief that an AI agent executes inside GitHub Actions. You write what you want — "summarize open issues and post a daily digest" — and the agent reads your repo, calls tools, reasons about the results, and posts the output automatically. The frontmatter is fully Actions-compatible — triggers, permissions, and runners all apply.
+An [**Agentic Workflow**](https://github.github.com/gh-aw/introduction/overview/) is a plain-English task brief that an AI agent executes inside GitHub Actions. You write what you want — "summarize open issues and post a daily digest" — and the agent reads your repo, calls [tools](https://github.github.com/gh-aw/reference/tools/), reasons about the results, and posts the output automatically. The [frontmatter](https://github.github.com/gh-aw/reference/frontmatter/) is fully Actions-compatible — [triggers](https://github.github.com/gh-aw/reference/triggers/), [permissions](https://github.github.com/gh-aw/reference/permissions/), and runners all apply.
 
 ![Animated GitHub Actions run showing four security jobs: activation validates the agent is authorized to run, agent runs with sandbox, firewall, and integrity filter enabled, detection scans for malicious code, and safe-outputs applies changes within guardrails](images/05-agent-run-log.svg)
 
@@ -139,8 +139,8 @@ Before you reveal the answers below, write a one-sentence definition for each te
 | Term | Plain-language meaning |
 |---|---|
 | Agentic workflow | A GitHub Actions workflow that uses an AI model to reason and act |
-| Lock file | The compiled YAML that GitHub Actions actually runs |
-| Engine | The AI model provider (for example, GitHub Copilot) used by the workflow |
+| [Lock file](https://github.github.com/gh-aw/reference/glossary/#workflow-lock-file-lockyml) | The compiled YAML that GitHub Actions actually runs |
+| [Engine](https://github.github.com/gh-aw/reference/engines/) | The AI model provider (for example, GitHub Copilot) used by the workflow |
 | `workflow_dispatch` | A manual trigger — you start the run by clicking a button in the Actions tab |
 
 Confirm each:

workshop/06-install-gh-aw.md

@@ -3,7 +3,7 @@
 <!-- learning: false -->
 # Install the gh-aw CLI Extension
 
-`gh-aw` is the CLI extension that compiles your agentic workflow Markdown files and triggers runs from your terminal. If you're on the GitHub UI path, no local installation is needed: an agent compiles the workflow, and GitHub Actions executes the committed lock file.
+`gh-aw` is the CLI extension that compiles your [agentic workflow](https://github.github.com/gh-aw/introduction/overview/) Markdown files and triggers runs from your terminal. If you're on the GitHub UI path, no local installation is needed: an agent compiles the workflow, and GitHub Actions executes the committed [lock file](https://github.github.com/gh-aw/reference/glossary/#workflow-lock-file-lockyml).
 
 ## 📋 Before You Start
 

workshop/06a-install-terminal.md

@@ -7,7 +7,7 @@
 
 ## 🎯 What You'll Do
 
-You'll verify the `gh` CLI is authenticated, install the `gh-aw` extension, and run one quick diagnostic to confirm your Codespace terminal is ready for agentic workflow setup.
+You'll verify the `gh` CLI is authenticated, install the `gh-aw` extension, and run one quick diagnostic to confirm your Codespace terminal is ready for [agentic workflow](https://github.github.com/gh-aw/introduction/overview/) setup.
 
 ## 📋 Before You Start
 

workshop/06b-install-local.md

@@ -7,7 +7,7 @@
 
 ## 🎯 What You'll Do
 
-You'll verify the `gh` CLI is authenticated, install the `gh-aw` extension, and run one quick diagnostic to confirm your local terminal is ready for agentic workflow setup.
+You'll verify the `gh` CLI is authenticated, install the `gh-aw` extension, and run one quick diagnostic to confirm your local terminal is ready for [agentic workflow](https://github.github.com/gh-aw/introduction/overview/) setup.
 
 ## 📋 Before You Start