Add link from MCP server Learning Path to Codex CLI install guide.

Author: jasonrandrews

content/install-guides/codex-cli.md

@@ -133,7 +133,7 @@ codex --version
 The output shows the version:
 
 ```output
-@openai/codex, 0.77.0
+@openai/codex, 0.79.0
 ```
 
 ## How do I authenticate with OpenAI?

content/learning-paths/servers-and-cloud-computing/arm-mcp-server/1-overview.md

@@ -92,6 +92,6 @@ The required configuration steps vary by AI coding assistant. Refer to the insta
 - [GitHub Copilot](/install-guides/github-copilot/)
 - [Gemini CLI](/install-guides/gemini/)
 - [Kiro CLI](/install-guides/kiro-cli/)
-- Codex CLI
+- [Codex CLI](/install-guides/codex-cli/)
 
 In the next section, you'll use direct AI chat with the Arm MCP Server to check Docker base images for Arm compatibility.