Bump axios from 0.21.0 to 0.21.1 in /backend

Bumps [axios](https://github.com/axios/axios) from 0.21.0 to 0.21.1.
- [Release notes](https://github.com/axios/axios/releases)
- [Changelog](https://github.com/axios/axios/blob/v0.21.1/CHANGELOG.md)
- [Commits](https://github.com/axios/axios/compare/v0.21.0...v0.21.1)

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

backend/package.json

@@ -30,7 +30,7 @@
   "dependencies": {
     "archiver": "^3.1.1",
     "async": "^3.1.0",
-    "axios": "^0.21.0",
+    "axios": "^0.21.1",
     "bcryptjs": "^2.4.0",
     "compression": "^1.7.4",
     "config": "^3.2.3",