Bump axios in /firestore/solution-scheduled-backups

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](axios/axios@v0.21.1...v0.21.2)

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

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

Author: dependabot[bot]

firestore/solution-scheduled-backups/package-lock.json

@@ -14,7 +14,7 @@
   "author": "Google, Inc.",
   "license": "Apache-2.0",
   "dependencies": {
-    "axios": "^0.21.1",
+    "axios": "^0.21.2",
     "dateformat": "^3.0.3",
     "express": "^4.17.1",
     "googleapis": "^42.0.0"