docs: update action references to @v1 in current examples

Update current documentation examples to use @v1:
- setup.md: Updated custom GitHub App workflow example
- configuration.md: Updated additional permissions examples

Note: Migration guide "Before (v0.x)" examples correctly retain
@beta references as that was the version tag used during v0.x.

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

Co-Authored-By: Claude <noreply@anthropic.com>

docs/configuration.md

@@ -130,7 +130,7 @@ To allow Claude to view workflow run results, job logs, and CI status:
 2. **Configure the action with additional permissions**:
 
    ```yaml
-   - uses: anthropics/claude-code-action@beta
+   - uses: anthropics/claude-code-action@v1
      with:
        anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
        additional_permissions: |
@@ -162,7 +162,7 @@ jobs:
   claude-ci-helper:
     runs-on: ubuntu-latest
     steps:
-      - uses: anthropics/claude-code-action@beta
+      - uses: anthropics/claude-code-action@v1
         with:
           anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
           additional_permissions: |

docs/setup.md

@@ -117,7 +117,7 @@ If you prefer to configure the app manually or need custom permissions:
              private-key: ${{ secrets.APP_PRIVATE_KEY }}
 
          # Use Claude with your custom app's token
-         - uses: anthropics/claude-code-action@beta
+         - uses: anthropics/claude-code-action@v1
            with:
              anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
              github_token: ${{ steps.app-token.outputs.token }}