update github files for current python constraints

Author: zzzeek

.github/workflows/run-on-pr.yaml

@@ -18,7 +18,7 @@ jobs:
         os:
           - "ubuntu-latest"
         python-version:
-          - "3.10"
+          - "3.14"
         tox-env:
           - ""
           - "-e pep8"

.github/workflows/run-test.yaml

@@ -23,11 +23,11 @@ jobs:
           - "windows-latest"
           - "macos-latest"
         python-version:
-          - "3.8"
-          - "3.9"
           - "3.10"
           - "3.11"
           - "3.12"
+          - "3.13"
+          - "3.14"
 
         exclude:
           # beaker raises warning on 3.10. only windows seems affected