Merge pull request #1042 from 5000164/feature/update-document-about-g…

…ithub-actions

Update GitHub Action documentation for Docker image stability and security

docs/docs/installation/github.md

@@ -28,13 +28,23 @@ jobs:
 ```
 
 
-if you want to pin your action to a specific release (v2.0 for example) for stability reasons, use:
+if you want to pin your action to a specific release (v0.23 for example) for stability reasons, use:
 ```yaml
 ...
     steps:
       - name: PR Agent action step
         id: pragent
-        uses: Codium-ai/[email protected]
+        uses: docker://codiumai/pr-agent:0.23-github_action
+...
+```
+
+For enhanced security, you can also specify the Docker image by its digest:
+```yaml
+...
+    steps:
+      - name: PR Agent action step
+        id: pragent
+        uses: docker://codiumai/pr-agent@sha256:14165e525678ace7d9b51cda8652c2d74abb4e1d76b57c4a6ccaeba84663cc64
 ...
 ```