Fix checkout step in manual deployment workflow to use 'ref' instead of 'tag'

Author: soderlind

.github/workflows/manual-deploy-release.yml

@@ -18,7 +18,7 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v4
         with:
-          tag: ${{ github.event.inputs.tag }}
+          ref: ${{ github.event.inputs.tag }}
 
       - name: WordPress Plugin Deploy
         uses: 10up/action-wordpress-plugin-deploy@stable