Update Rust crate bb8 to 0.8.5 (#163)

Co-authored-by: oxide-renovate[bot] <146848827+oxide-renovate[bot]@users.noreply.github.com>

Author: oxide-renovate[bot]

Cargo.lock

@@ -20,7 +20,7 @@ anyhow = "1.0.86"
 async-bb8-diesel = { git = "https://github.com/oxidecomputer/async-bb8-diesel" }
 async-trait = "0.1.81"
 base64 = "0.22"
-bb8 = "0.8.3"
+bb8 = "0.8.5"
 chrono = "0.4.38"
 clap = { version = "4.5.4", features = ["derive", "string", "env"] }
 config = { version = "0.14.0", features = ["toml"] }