fix(deps): bump convict from 6.2.2 to 6.2.3 (#3841)

Bumps [convict](https://github.com/mozilla/node-convict) from 6.2.2 to 6.2.3.
- [Release notes](https://github.com/mozilla/node-convict/releases)
- [Changelog](https://github.com/mozilla/node-convict/blob/master/CHANGELOG.md)
- [Commits](mozilla/node-convict@v6.2.2...v6.2.3)

---
updated-dependencies:
- dependency-name: convict
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -95,7 +95,7 @@
     "compression": "~1.7.2",
     "connect-datadog": "0.0.9",
     "connect-mongo": "^4.4.1",
-    "convict": "^6.2.2",
+    "convict": "^6.2.3",
     "convict-format-with-validator": "^6.2.0",
     "cookie-parser": "~1.4.6",
     "css-toggle-switch": "^4.1.0",