build: Put the Python version in quotes for Lint/Test workflow

Author: gfieni

.github/workflows/lint_and_test.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.8]
+        python-version: ['3.8']
     services:
       mongo:
         image: mongo:latest