chore(deps): bump express from 4.17.1 to 4.17.3

Bumps [express](https://github.com/expressjs/express) from 4.17.1 to 4.17.3.
- [Release notes](https://github.com/expressjs/express/releases)
- [Changelog](https://github.com/expressjs/express/blob/master/History.md)
- [Commits](expressjs/express@4.17.1...4.17.3)

---
updated-dependencies:
- dependency-name: express
  dependency-type: direct:production
...

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

package.json

@@ -21,7 +21,7 @@
     "@kiltprotocol/core": "0.26.0",
     "@kiltprotocol/did": "0.26.0",
     "dotenv": "^8.2.0",
-    "express": "^4.17.1",
+    "express": "^4.17.3",
     "node-fetch": "^3.1.1"
   },
   "devDependencies": {