docs: use workspace README.md for gateway-api crate

Signed-off-by: Shane Utt <[email protected]>

Author: shaneutt

gateway-api/Cargo.toml

@@ -9,6 +9,7 @@ categories = ["api-bindings"]
 homepage = "https://gateway-api.sigs.k8s.io/"
 repository = "https://github.com/kube-rs/gateway-api-rs"
 edition = "2021"
+readme = "../README.md"
 
 [dependencies]
 kube = { version = "0.96.0", default-features = false, features = ["derive"] }