workflows: Bump action-release to get github-script@v7

This gets rid of the obsolete node.js 16. See
cockpit-project/action-release@7d2e2657382e8

Author: martinpitt

.github/workflows/release.yml

@@ -22,6 +22,6 @@ jobs:
         run: sudo PUBLISH_TAR=1 tests/run-apt
 
       - name: Create GitHub release
-        uses: cockpit-project/action-release@88d994da62d1451c7073e26748c18413fcdf46e9
+        uses: cockpit-project/action-release@7d2e2657382e8d34f88a24b5987f2b81ea165785
         with:
           filename: "umockdev-${{ github.ref_name }}.tar.xz"