pin release asset link in kopium since kopium changed

closes #145

Signed-off-by: clux <[email protected]>

README.md

@@ -33,7 +33,7 @@ ldd target/x86_64-unknown-linux-musl/release/EXECUTABLE
 - [Kubernetes controller with actix-web using plain distroless/static](https://github.com/kube-rs/controller-rs/blob/main/Dockerfile)
 - [Kubernetes reflector with axum using builder pattern](https://github.com/kube-rs/version-rs/blob/main/Dockerfile)
 - [Kubernetes controller using cargo-chef for caching layers](https://github.com/qualified/ephemeron/blob/main/k8s/controller/Dockerfile)
-- [Github release assets uploaded via github actions](https://github.com/kube-rs/kopium/blob/main/.github/workflows/release.yml)
+- [Github release assets uploaded via github actions](https://github.com/kube-rs/kopium/blob/f554ad9780dec3c76b4cef8a16a02bc82dded2be/.github/workflows/release.yml)
 
 The binaries and images for small apps generally end up `<10MB` compressed or `~20MB` uncompressed without stripping.