Pin super-linter to a less noisy version. (#7706)

The latest point release includes https://github.com/github/super-linter/pull/2295
which enables a bunch of checks that break existing use.

.github/workflows/linter.yml

@@ -21,7 +21,7 @@ jobs:
       - name: Checkout Code
         uses: actions/checkout@v2.4.0
       - name: Lint Code Base
-        uses: docker://github/super-linter:v4
+        uses: docker://github/super-linter:v4.8.5
         env:
           LINTER_RULES_PATH: .
           VALIDATE_ALL_CODEBASE: true