Update index.mdx

Co-authored-by: ldecarvalho-doc <[email protected]>

Author: LLejoly

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

@@ -29,7 +29,7 @@ Create the GitHub Actions Workflow
 1. In your GitHub repository, navigate to the `.github/workflows` directory. If it does not exist, create it at the root of your repository.
 2. Create a new file named `deploy.yml` in the `.github/workflows` directory.
 
-Define the workflow
+## Defining the workflow
 
 Copy and paste the following code into the `deploy.yml` file. This workflow will run on every push to the `main` branch, build your Astro website, and upload the built files to Scaleway Object Storage.