fix(openchallenges): set Nx references in the release workflow (#2873)

.github/workflows/release.yml

@@ -25,6 +25,9 @@ jobs:
           echo "VERSION=${VERSION}" >> $GITHUB_ENV
           echo "Docker image tag will be: ${VERSION}"
 
+      - name: Derive appropriate SHAs for base and head for `nx affected` commands
+        uses: nrwl/nx-set-shas@v4
+
       - name: Set up the dev container
         uses: ./.github/actions/setup-dev-container