install gitpython for release CI

Author: jakkdl

.github/workflows/ci.yml

@@ -68,7 +68,7 @@ jobs:
             - name: Set up Python 3
               uses: actions/setup-python@v3
             - name: Install tools
-              run: python -m pip install --upgrade build pip setuptools wheel twine
+              run: python -m pip install --upgrade build pip setuptools wheel twine gitpython
             - name: Upload new release
               env:
                   TWINE_USERNAME: __token__