Tell checkout Action to fetch tags, as they are necessary to determine the version

Author: IshaanDesai

.github/workflows/pythonpublish.yml

@@ -10,6 +10,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v4
+      with:
+        fetch-tags: true
     - name: Set up Python
       uses: actions/setup-python@v5
       with: