fix(shield-axum): enable utoipa feature for shield (#93)

Author: DanielleHuisman

packages/integrations/shield-axum/Cargo.toml

@@ -18,4 +18,4 @@ utoipa = { workspace = true, features = ["axum_extras"], optional = true }
 
 [features]
 default = []
-utoipa = ["dep:utoipa"]
+utoipa = ["dep:utoipa", "shield/utoipa"]