remove obsolete py ver 3.7 and add 3.11

Author: jjw24

.github/workflows/sdist.yaml

@@ -21,10 +21,10 @@ jobs:
       fail-fast: false
       matrix:
         python-version:
-          - "3.7"
           - "3.8"
           - "3.9"
           - "3.10"
+          - "3.11"
     steps:
       - uses: actions/checkout@v4
         with: