Fixed typo in testing matrix

Author: fabiolsilva

.github/workflows/gmsvtoolkit-ci.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [ "3.8", "3.9", "3.10", "3.11", "3,12" ]
+        python-version: [ "3.8", "3.9", "3.10", "3.11", "3.12" ]
     steps:
     - name: set GMSVTOOLKIT_DIR
       run: echo "GMSVTOOLKIT_BASE_DIR=$RUNNER_WORKSPACE/gmsvtoolkit" >> $GITHUB_ENV