Fix typo in path to called workflow file

Author: vcschapp

.github/workflows/check-python-package-versions.yaml

@@ -9,7 +9,7 @@ on:
 jobs:
   check:
     if: github.event.pull_request.head.repo.full_name == github.repository
-    uses: ./.github/workflows/reusable-check-python-package-versions.yaml'
+    uses: ./.github/workflows/reusable-check-python-package-versions.yaml
     with:
       before_commit: ${{ github.event.pull_request.base.sha }}
       after_commit: ${{ github.event.pull_request.head.sha }}