Update dependency typescript to v6

Author: renovate[bot]

package.json

@@ -19,7 +19,7 @@
     "hastscript": "^9.0.1",
     "sharp": "^0.34.5",
     "starlight-links-validator": "^0.19.2",
-    "typescript": "^5.9.3"
+    "typescript": "^6.0.0"
   },
   "devDependencies": {
     "@biomejs/biome": "^2.3.13",