Update cc-sdd reference to cc-spex in Community Friends (#2007)

The cc-sdd project has been renamed to cc-spex (v3.0.0).

Assisted-By: 🤖 Claude Code

Author: rhuss

README.md

@@ -269,7 +269,7 @@ See Spec-Driven Development in action across different scenarios with these comm
 
 Community projects that extend, visualize, or build on Spec Kit:
 
-- **[cc-sdd](https://github.com/rhuss/cc-sdd)** - A Claude Code plugin that adds composable traits on top of Spec Kit with [Superpowers](https://github.com/obra/superpowers)-based quality gates, spec/code review, git worktree isolation, and parallel implementation via agent teams.
+- **[cc-spex](https://github.com/rhuss/cc-spex)** - A Claude Code plugin that adds composable traits on top of Spec Kit with [Superpowers](https://github.com/obra/superpowers)-based quality gates, spec/code review, git worktree isolation, and parallel implementation via agent teams.
 
 - **[Spec Kit Assistant](https://marketplace.visualstudio.com/items?itemName=rfsales.speckit-assistant)** — A VS Code extension that provides a visual orchestrator for the full SDD workflow (constitution → specification → planning → tasks → implementation) with phase status visualization, an interactive task checklist, DAG visualization, and support for Claude, Gemini, GitHub Copilot, and OpenAI backends. Requires the `specify` CLI in your PATH.