update retry to middleware v2 (#438)

Signed-off-by: Kenny Leung <kleung@chainguard.dev>

Author: k4leung4

go.mod

@@ -5,7 +5,7 @@ go 1.23.1
 require (
 	github.com/chainguard-dev/clog v1.7.0
 	github.com/google/go-cmp v0.7.0
-	github.com/grpc-ecosystem/go-grpc-middleware v1.4.0
+	github.com/grpc-ecosystem/go-grpc-middleware/v2 v2.3.2
 	github.com/grpc-ecosystem/go-grpc-prometheus v1.2.1-0.20210315223345-82c243799c99
 	github.com/grpc-ecosystem/grpc-gateway/v2 v2.27.1
 	github.com/kelseyhightower/envconfig v1.4.0