Bump @types/express from 4.17.20 to 4.17.21

---
updated-dependencies:
- dependency-name: "@types/express"
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -42,7 +42,7 @@
         "@babel/core": "7.23.2",
         "@babel/eslint-parser": "7.22.15",
         "@types/csso": "5.0.3",
-        "@types/express": "4.17.20",
+        "@types/express": "4.17.21",
         "@types/html-minifier-terser": "7.0.2",
         "@types/node": "20.9.0",
         "@types/node-schedule": "2.1.3"