Update index.mdx

Add additional section + change checkout version

Author: LLejoly

tutorials/cicd-github-action-object-storage-sync/index.mdx

@@ -43,12 +43,11 @@ on:
 
 jobs:
   upload:
-    environment: prd
     runs-on: ubuntu-latest
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: Set up Node.js
         uses: actions/setup-node@v2
@@ -115,3 +114,11 @@ If your project uses a different build process, replace the `Install dependencie
       - name: Build the project
         run: uv build
 ```
+
+## Troubleshooting and additional resources
+
+- If you encounter issues while using your API key with Scaleway Object Storage, refer to the [dedicated troubleshooting](/object-storage/troubleshooting/api-key-does-not-work/).
+
+- Refer to the [official GitHub Actions documentation](https://docs.github.com/en/actions/writing-workflows/quickstart) for more information on how to create and run workflows.
+
+- Learn how to better secure your deployment by properly [setting up IAM and Object Storage](/object-storage/api-cli/combining-iam-and-object-storage/)