build(deps): update rand requirement from 0.8 to 0.9

Updates the requirements on [rand](https://github.com/rust-random/rand) to permit the latest version.
- [Release notes](https://github.com/rust-random/rand/releases)
- [Changelog](https://github.com/rust-random/rand/blob/master/CHANGELOG.md)
- [Commits](rust-random/rand@0.8.0...0.9.0)

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

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

actix-session/Cargo.toml

@@ -32,7 +32,7 @@ actix-web = { version = "4", default-features = false, features = ["cookies", "s
 
 anyhow = "1"
 derive_more = { version = "2", features = ["display", "error", "from"] }
-rand = "0.8"
+rand = "0.9"
 serde = { version = "1" }
 serde_json = { version = "1" }
 tracing = { version = "0.1.30", default-features = false, features = ["log"] }