Add /github/workspace as safe Git directory

https://github.blog/2022-04-12-git-security-vulnerability-announced/

Author: robertlemke

.github/workflows/docker.build.yaml

@@ -17,6 +17,9 @@ jobs:
           ref: 'main'
           fetch-depth: 100
 
+      - run: |
+          git config --global --add safe.directory /github/workspace
+
       - name: Determine latest version
         id: latest_version
         uses: flownative/action-git-latest-release@master