Update CI workflow to use Python 3.12 only

Author: yuriyzubov

.github/workflows/ci.yaml

@@ -12,7 +12,7 @@ jobs:
 
     strategy:
       matrix:
-        python-version: ['3.10', '3.11', '3.12']
+        python-version: ['3.12'] #['3.10', '3.11', '3.12']
 
     steps:
       - uses: actions/checkout@v4