Bump MegaLinter v7 to v8.1.0 (#474)

Author: vkucera

.github/workflows/mega-linter.yml

@@ -43,7 +43,7 @@ jobs:
         id: ml
         # You can override MegaLinter flavor used to have faster performances
         # More info at https://megalinter.io/flavors/
-        uses: oxsecurity/megalinter@v7
+        uses: oxsecurity/megalinter@v8.1.0
         env:
           # All available variables are described in documentation
           # https://megalinter.io/configuration/