Quote Python version strings in unit-test matrix to preserve trailing zeros

Author: sewhyte

.github/workflows/unit-test.yml

@@ -16,13 +16,13 @@ jobs:
       max-parallel: 1
       matrix:
         python-version:
-          - 3.8
-          - 3.9
-          - 3.10
-          - 3.11
-          - 3.12
-          - 3.13
-          - 3.14
+          - "3.8"
+          - "3.9"
+          - "3.10"
+          - "3.11"
+          - "3.12"
+          - "3.13"
+          - "3.14"
         os:
           - ubuntu-latest