Update run_test.yaml

Change to run only on py3.12

Author: jkocz

.github/workflows/run_test.yaml

@@ -7,7 +7,7 @@ jobs:
         runs-on: ubuntu-latest
         strategy: 
             matrix:
-                python-version: [3.8, 3.11]
+                python-version: [3.12]
         steps:
             - uses: actions/checkout@v3
             - name: Set up Python ${{ matrix.python-version }}