fix: Log deprecation warning for /release endpoint (#1858)

Ref: SRX-WBWPQA

services/frontend-service/pkg/handler/release.go

@@ -268,7 +268,7 @@ func (s Server) HandleRelease(w http.ResponseWriter, r *http.Request, tail strin
 	}
 
 	writeCorrespondingResponse(ctx, w, r, releaseResponse, err)
-	_, _ = w.Write([]byte("warning: /release endoint will be deprecated soon, use /api/release instead. Check https://github.com/freiheit-com/kuberpult/blob/main/docs/endpoint-release.md for more information.\n"))
+	logger.FromContext(ctx).Warn("warning: /release endoint will be deprecated soon, use /api/release instead. Check https://github.com/freiheit-com/kuberpult/blob/main/docs/endpoint-release.md for more information.\n")
 }
 
 func (s Server) handleApiRelease(w http.ResponseWriter, r *http.Request, tail string) {