Change srt python versions to 3.10 and 3.12

3.9 gives a warning, which seems to create a error in the GitHub
testing. So instead of 3.9 and 3.11, use 3.10 and 3.12.

Author: billsacks

.github/workflows/srt.yml

@@ -19,7 +19,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: [ 3.9, 3.11, 3.x ]
+        python-version: [ 3.10, 3.12, 3.x ]
     env:
       CC: mpicc
       FC: mpifort