feat(rumdl): update schema to v0.1.28 (SchemaStore#5411)

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

Author: rvben

src/schemas/json/rumdl.json

@@ -311,6 +311,11 @@
       "description": "Per-language tool configuration.",
       "type": "object",
       "properties": {
+        "enabled": {
+          "description": "Whether code block tools are enabled for this language (default: true).\nSet to false to acknowledge a language without configuring tools.\nThis satisfies strict mode (on-missing-language-definition) checks.",
+          "type": "boolean",
+          "default": true
+        },
         "lint": {
           "description": "Tools to run in lint mode (rumdl check)",
           "type": "array",