Fix CI: auto-sync plugins.json, ignore hol.org from link check

- validate-plugins.yml: auto-commit regenerated plugins.json instead of failing
  on race conditions when PRs don't update plugins.json
- .mlc_config.json: add hol.org to ignore patterns (returns 503 intermittently)

Author: internet-dot

.github/workflows/validate-plugins.yml

@@ -1,4 +1,4 @@
-name: Validate plugins.json
+name: Sync plugins.json
 
 on:
   pull_request:
@@ -13,23 +13,30 @@ on:
       - plugins.json
       - scripts/generate_plugins_json.py
 
+permissions:
+  contents: write
+
 jobs:
-  validate:
-    name: Check plugins.json matches README
+  sync:
+    name: Sync plugins.json with README
     runs-on: ubuntu-latest
-    permissions:
-      contents: read
     steps:
       - uses: actions/checkout@v4
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
       - uses: actions/setup-python@v5
         with:
           python-version: "3.12"
-      - name: Regenerate and compare
+      - name: Regenerate and commit if changed
         run: |
           python3 scripts/generate_plugins_json.py
           if ! git diff --quiet plugins.json; then
-            echo "::error::plugins.json is out of sync with README.md. Run: python3 scripts/generate_plugins_json.py"
-            git diff plugins.json
-            exit 1
+            echo "::notice::plugins.json was out of sync — auto-committing"
+            git config user.name "github-actions[bot]"
+            git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
+            git add plugins.json
+            git commit -m "chore: sync plugins.json with README"
+            git push
+          else
+            echo "plugins.json is up to date"
           fi
-          echo "plugins.json is up to date"

.mlc_config.json

@@ -1,17 +1 @@
-{
-  "ignorePatterns": [
-    {
-      "pattern": "^https://developers.openai.com"
-    },
-    {
-      "pattern": "^https://awesome.re"
-    },
-    {
-      "pattern": "^https://community.openai.com"
-    }
-  ],
-  "aliveStatusCodes": [200, 301, 302, 403],
-  "retryOn429": true,
-  "retryCount": 5,
-  "fallbackRetryDelay": 30000
-}
+{"ignorePatterns":[{"pattern":"^https://developers.openai.com"},{"pattern":"^https://awesome.re"},{"pattern":"^https://community.openai.com"},{"pattern":"^https://hol.org"}],"aliveStatusCodes":[200,301,302,403],"retryOn429":true,"retryCount":5,"fallbackRetryDelay":30000}