Merge pull request gitpython-developers#2057 from gitpython-developers/dependabot/github_actions/cygwin/cygwin-install-action-6

Bump cygwin/cygwin-install-action from 5 to 6

Author: Byron

.github/workflows/cygwin-test.yml

@@ -39,7 +39,7 @@ jobs:
         fetch-depth: 0
 
     - name: Install Cygwin
-      uses: cygwin/cygwin-install-action@v5
+      uses: cygwin/cygwin-install-action@v6
       with:
         packages: git python39 python-pip-wheel python-setuptools-wheel python-wheel-wheel
         add-to-path: false  # No need to change $PATH outside the Cygwin environment.