github: add python 3.11 to test-ci.yml

added python 3.11 to the test matrix.

Change-Id: I0533205b5a10105b3144f770aa08c4c649aaf6be
Reviewed-on: https://gerrit-review.googlesource.com/c/git-repo/+/389675
Tested-by: Daniel Kutik <daniel.kutik@lavawerk.com>
Commit-Queue: Daniel Kutik <daniel.kutik@lavawerk.com>
Reviewed-by: Mike Frysinger <vapier@google.com>
diff --git a/.github/workflows/test-ci.yml b/.github/workflows/test-ci.yml
index bf53b40..3613d82 100644
--- a/.github/workflows/test-ci.yml
+++ b/.github/workflows/test-ci.yml
@@ -15,7 +15,7 @@
       matrix:
         # ubuntu-20.04 is the last version that supports python 3.6
         os: [ubuntu-20.04, macos-latest, windows-latest]
-        python-version: ['3.6', '3.7', '3.8', '3.9', '3.10']
+        python-version: ['3.6', '3.7', '3.8', '3.9', '3.10', '3.11']
     runs-on: ${{ matrix.os }}
 
     steps: