chore(deps): bump grib from 0.15.6 to 0.16.0 in /backend

Bumps [grib](https://github.com/noritada/grib-rs) from 0.15.6 to 0.16.0.
- [Changelog](https://github.com/noritada/grib-rs/blob/master/CHANGELOG.md)
- [Commits](noritada/grib-rs@v0.15.6...v0.16.0)

---
updated-dependencies:
- dependency-name: grib
  dependency-version: 0.16.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

backend/Cargo.lock

@@ -29,7 +29,7 @@ hmac = "0.13.0"
 sha1 = "0.11.0"
 md5 = "0.8.0"
 base64 = "0.22.1"
-grib = { version = "0.15.6", default-features = false }
+grib = { version = "0.16.0", default-features = false }
 
 [dev-dependencies]
 wiremock = "0.6"