Merge pull request #5577 from mruby/dependabot/github_actions/github/super-linter-4.8.4

build(deps): bump github/super-linter from 4.8.3 to 4.8.4

.github/workflows/super-linter.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2.4.0
-      - uses: github/super-linter@v4.8.3
+      - uses: github/super-linter@v4.8.4
         env:
           ERROR_ON_MISSING_EXEC_BIT: true
           VALIDATE_BASH: true