fix: add /app/installation-requests to requires-app-auth paths (#594)

Author: Drew-Kimberly

src/requires-app-auth.ts

@@ -8,6 +8,7 @@ const PATHS = [
   "/app/installations/{installation_id}",
   "/app/installations/{installation_id}/access_tokens",
   "/app/installations/{installation_id}/suspended",
+  "/app/installation-requests",
   "/marketplace_listing/accounts/{account_id}",
   "/marketplace_listing/plan",
   "/marketplace_listing/plans",