fix(deps): update dependency @octokit/app to v12

Co-authored-by: Renovate Bot <[email protected]>

Author: renovate[bot]

package-lock.json

@@ -20,7 +20,7 @@
     "test:typescript": "npx tsc --noEmit --declaration --noUnusedLocals --esModuleInterop --strict test/typescript-validate.ts"
   },
   "dependencies": {
-    "@octokit/app": "^11.4.1",
+    "@octokit/app": "^12.0.0",
     "@octokit/core": "^3.3.1",
     "@octokit/oauth-app": "^3.3.0",
     "@octokit/plugin-paginate-rest": "^2.13.3",