Only run tests on latest point release of every major release

.github/workflows/test.yml

@@ -18,13 +18,13 @@ jobs:
       matrix:
         emacs_version:
           - 27.2
-          - 27.1
+          # - 27.1
           - 26.3
-          - 26.2
-          - 26.1
+          # - 26.2
+          # - 26.1
           - 25.3
-          - 25.2
-          - 25.1
+          # - 25.2
+          # - 25.1
           - 24.5
           - 24.4
           - snapshot