Update Rust crate diesel to 2.2.7 (#7515)

Author: oxide-renovate[bot]

Cargo.lock

@@ -378,7 +378,7 @@ debug-ignore = "1.0.5"
 derive_more = "0.99.18"
 derive-where = "1.2.7"
 # Having the i-implement-... feature here makes diesel go away from the workspace-hack
-diesel = { version = "2.2.6", features = ["i-implement-a-third-party-backend-and-opt-into-breaking-changes", "postgres", "r2d2", "chrono", "serde_json", "network-address", "uuid"] }
+diesel = { version = "2.2.7", features = ["i-implement-a-third-party-backend-and-opt-into-breaking-changes", "postgres", "r2d2", "chrono", "serde_json", "network-address", "uuid"] }
 diesel-dtrace = "0.4.2"
 dns-server = { path = "dns-server" }
 dns-server-api = { path = "dns-server-api" }