Update Rust crate diesel to 2.0.4

Cargo.toml

@@ -10,6 +10,6 @@ doctest = false
 [dependencies]
 anyhow = "1.0.69"
 async-graphql = { version = "5.0.7", default-features = false, features = [ "chrono" ] }
-diesel = { version = "2.0.3", default-features = false }
+diesel = { version = "2.0.4", default-features = false }
 rand = "0.8.5"
 serde = { version = "1.0.160", features = [ "derive" ] }