Update super-linter.yml validate json (#368)

Author: jbampton

.github/workflows/super-linter.yml

@@ -24,6 +24,7 @@ jobs:
         env:
           ERROR_ON_MISSING_EXEC_BIT: true
           VALIDATE_EDITORCONFIG: true
+          VALIDATE_JSON: true
           VALIDATE_MARKDOWN: true
           VALIDATE_YAML: true
           VALIDATE_BIOME_LINT: true