chore(deps): update commitlint monorepo to v20

Author: renovate[bot]

package.json

@@ -66,8 +66,8 @@
   },
   "devDependencies": {
     "@anthropic-ai/dxt": "^0.2.6",
-    "@commitlint/cli": "^19.8.1",
-    "@commitlint/config-conventional": "^19.8.1",
+    "@commitlint/cli": "^20.1.0",
+    "@commitlint/config-conventional": "^20.0.0",
     "@cybozu/eslint-config": "^24.2.0",
     "@cybozu/license-manager": "^1.4.0",
     "@modelcontextprotocol/inspector": "^0.16.8",