Bump pm2 from 5.1.0 to 5.1.1 in /ee/server/services

Bumps [pm2](https://github.com/Unitech/pm2) from 5.1.0 to 5.1.1.
- [Release notes](https://github.com/Unitech/pm2/releases)
- [Changelog](https://github.com/Unitech/pm2/blob/master/CHANGELOG.md)
- [Commits](https://github.com/Unitech/pm2/commits/5.1.1)

---
updated-dependencies:
- dependency-name: pm2
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

ee/server/services/package.json

@@ -44,8 +44,8 @@
 		"@types/express": "^4.17.13",
 		"@types/mongodb": "^3.6.19",
 		"@types/node": "^14.17.4",
-		"@types/ws": "^7.4.6",
-		"pm2": "^5.1.0",
+		"@types/ws": "^7.4.7",
+		"pm2": "^5.1.1",
 		"ts-node": "^10.0.0",
 		"typescript": "^4.3.5"
 	}