Bump axios from 0.21.1 to 0.21.2 in /backend

Bumps [axios](https://github.com/axios/axios) from 0.21.1 to 0.21.2.
- [Release notes](https://github.com/axios/axios/releases)
- [Changelog](https://github.com/axios/axios/blob/master/CHANGELOG.md)
- [Commits](https://github.com/axios/axios/compare/v0.21.1...v0.21.2)

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

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

backend/package.json

@@ -33,7 +33,7 @@
     "archiver": "^3.1.1",
     "async": "^3.1.0",
     "async-mutex": "^0.3.1",
-    "axios": "^0.21.1",
+    "axios": "^0.21.2",
     "bcryptjs": "^2.4.0",
     "compression": "^1.7.4",
     "config": "^3.2.3",