chore(deps): update dependency @types/express to v4.17.21

Author: renovate[bot]

packages/app-studio-toolkit/package.json

@@ -397,7 +397,7 @@
     "@sap-devx/app-studio-toolkit-types": "workspace:*",
     "@types/body-parser": "1.19.5",
     "@types/cors": "^2.8.13",
-    "@types/express": "4.17.17",
+    "@types/express": "4.17.21",
     "@types/http-terminator": "2.0.5",
     "@types/proxyquire": "1.3.28",
     "@types/url-join": "4.0.1",