github-actions/pnl-ci-docs: Only remove zero tag if it was successful…

…ly added

This avoids cascading error if the workload fails before the tag was
added.

Signed-off-by: Jan Vesely <jan.vesely@rutgers.edu>

.github/workflows/pnl-ci-docs.yml

@@ -96,6 +96,7 @@ jobs:
       # set it to a fixed value to prevent polluting the diff
       # This needs to be done after installing PNL
       # to not interfere with dependency resolving
+      id: add_zero_tag
       if: github.event_name == 'pull_request'
       run: git tag --force 'v0.0.0.0'
 
@@ -105,7 +106,7 @@ jobs:
     - name: Remove git tag
       # The generated docs include PNL version,
       # This was set to a fixed value to prevent polluting the diff
-      if: github.event_name == 'pull_request' && always()
+      if: steps.add_zero_tag.conclusion == 'success'
       run: git tag -d 'v0.0.0.0'
 
     - name: Upload Documentation