Bump rand from 0.8.6 to 0.9.4

Bumps [rand](https://github.com/rust-random/rand) from 0.8.6 to 0.9.4.
- [Release notes](https://github.com/rust-random/rand/releases)
- [Changelog](https://github.com/rust-random/rand/blob/0.9.4/CHANGELOG.md)
- [Commits](rust-random/rand@0.8.6...0.9.4)

---
updated-dependencies:
- dependency-name: rand
  dependency-version: 0.9.4
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Cargo.lock

@@ -67,7 +67,7 @@ opentelemetry-semantic-conventions = { version = "0.31", optional = true }
 tracing-opentelemetry = { version = "0.32", optional = true }
 
 # CSRF (feature-gated)
-rand = { version = "0.8", optional = true }
+rand = { version = "0.9", optional = true }
 base64 = { version = "0.22", optional = true }
 
 # OAuth2 (feature-gated)