release workflow: Fetch tag properly

This will avoid unit test failures on tags.

Author: martinpitt

.github/workflows/release.yml

@@ -18,6 +18,9 @@ jobs:
       - name: Pacify git's permission check
         run: git config --global --add safe.directory /__w
 
+      - name: Workaround for https://github.com/actions/checkout/pull/697
+        run: git fetch --force origin $(git describe --tags):refs/tags/$(git describe --tags)
+
       - name: Install dependencies
         run: |
           sudo apt-get update