Update Rust crate bb8 to 0.9.0

Author: oxide-renovate[bot]

Cargo.toml

@@ -11,7 +11,7 @@ resolver = "2"
 async-bb8-diesel = { git = "https://github.com/oxidecomputer/async-bb8-diesel" }
 async-trait = "0.1.83"
 base64 = "0.22"
-bb8 = "0.8.6"
+bb8 = "0.9.0"
 chrono = "0.4.39"
 cookie = { version = "0.18.1" }
 crc32c = "0.6.8"