ci(add-to-project): Add project URL for local triggers

.github/workflows/add-to-project.yml

@@ -23,6 +23,13 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/[email protected]
+        env:
+          # We use this workflow locally for hugrverse-actions issues.
+          # This variable detects whether we are running the workflow locally or via an external workflow_call.
+          #
+          # Github's terrible version of a 'ternary operator'
+          # https://github.com/actions/runner/issues/409#issuecomment-752775072
+          PROJECT_URL: ${{ github.repository == env.REPOSITORY && 'https://github.com/orgs/CQCL-DEV/projects/10' || github.event.inputs.project-url }}
         with:
-          project-url: ${{ github.event.inputs.project-url }}
+          project-url: ${{ env.PROJECT_URL }}
           github-token: ${{ secrets.ADD_TO_PROJECT_PAT }}