docs: update README with workflow instructions for APICURON reporting

Author: Mehdi-SK

README.md

@@ -11,4 +11,28 @@ A GitHub Action that reports pushes to your repository to APICURON, associating
      - `REPORT_API_ENDPOINT`: APICURON report API URL
      - `REPORT_API_TOKEN`: APICURON API auth token
      - `USER_INFO_SERVICE_ENDPOINT`: ORCID lookup service URL
-     - `USER_INFO_SERVICE_TOKEN`: ORCID service auth token
+     - `USER_INFO_SERVICE_TOKEN`: ORCID service auth token
+2. **Create Workflow File**:
+   `.github/workflows/apicuron-report.yml`
+   ```yaml
+   name: APICURON Reporting
+   on: [push]
+   
+   jobs:
+     report:
+       runs-on: ubuntu-latest
+       steps:
+         - uses: actions/checkout@v4
+           
+         - name: Submit to APICURON
+           uses: ./.github/actions/apicuron-on-commit
+           with:
+             GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+             REPORT_API_ENDPOINT: ${{ secrets.REPORT_API_ENDPOINT }}
+             REPORT_API_TOKEN: ${{ secrets.REPORT_API_TOKEN }}
+             USER_INFO_SERVICE_ENDPOINT: ${{ secrets.USER_INFO_SERVICE_ENDPOINT }}
+             USER_INFO_SERVICE_TOKEN: ${{ secrets.USER_INFO_SERVICE_TOKEN }}
+             RESOURCE_ID: 'your-resource-id'  # e.g., repository ID
+             ACTIVITY_NAME: 'commit'          # APICURON activity type
+             LEAGUE: 'default'                # APICURON league
+