Use inputs context instead of github event context

Author: rvermeulen

.github/workflows/post-release.yml

@@ -24,7 +24,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
         with:
-          ref: ${{ github.event.inputs.ref }}
+          ref: ${{ inputs.ref }}
       - name: Install Python
         uses: actions/setup-python@v4
         with: