Update rocket requirement from =0.5.0 to =0.5.1

Updates the requirements on [rocket](https://github.com/rwf2/Rocket) to permit the latest version.
- [Release notes](https://github.com/rwf2/Rocket/releases)
- [Changelog](https://github.com/rwf2/Rocket/blob/master/CHANGELOG.md)
- [Commits](rwf2/Rocket@v0.5.0...v0.5.1)

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

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

Author: dependabot[bot]

Cargo.toml

@@ -16,4 +16,4 @@ publish = true
 base64 = "0.21.5"
 bcrypt = "0.15.0"
 rand = "0.8.5"
-rocket = { version = "=0.5.0", features = ["secrets"] }
+rocket = { version = "=0.5.1", features = ["secrets"] }