Update python-linting.yml

removing python 3.5 and 3.6, not available on ubuntu 22.04

Author: bkemper24

.github/workflows/python-linting.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [2.7, 3.5, 3.6, 3.7, 3.8]
+        python-version: [2.7, 3.7, 3.8]
 
     steps:
     - uses: actions/checkout@v3