ci: use GitHub-hosted runners with generic Xcode path

- Use macos-latest instead of self-hosted
- Change Xcode_16.0.app to Xcode.app for compatibility

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: 0xLeif

.github/workflows/docs.yml

@@ -16,7 +16,7 @@ jobs:
     - uses: actions/checkout@v4
 
     - name: Select Xcode
-      run: sudo xcode-select -s /Applications/Xcode_16.0.app/Contents/Developer
+      run: sudo xcode-select -s /Applications/Xcode.app/Contents/Developer
 
     - name: Build Documentation
       run: |

.github/workflows/macOS.yml

@@ -10,7 +10,7 @@ jobs:
     steps:
     - uses: actions/checkout@v4
     - name: Select Xcode
-      run: sudo xcode-select -s /Applications/Xcode_16.0.app/Contents/Developer
+      run: sudo xcode-select -s /Applications/Xcode.app/Contents/Developer
     - name: Build
       run: swift build -v
     - name: Run tests