Use the sha for the check run

Author: rvermeulen

.github/workflows/validate-release.yml

@@ -147,7 +147,7 @@ jobs:
           --header "Accept: application/vnd.github+json" \
           --header "X-GitHub-Api-Version: 2022-11-28" \
           --field name="release-status" \
-          --field head_sha="$GITHUB_REF" \
+          --field head_sha="$GITHUB_SHA" \
           --field status="in_progress" \
           --jq ".id" \
           /repos/$GITHUB_REPOSITORY/check-runs)