chore(deps): update dependency @typespec/prettier-plugin-typespec to v1.9.0 (#156)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

package.json

@@ -4,7 +4,7 @@
   "devDependencies": {
     "@biomejs/biome": "2.2.7",
     "@moonrepo/cli": "1.41.7",
-    "@typespec/prettier-plugin-typespec": "1.8.0",
+    "@typespec/prettier-plugin-typespec": "1.9.0",
     "lefthook": "1.13.6",
     "prettier": "3.8.1",
     "publint": "0.3.17",