Merge pull request #226 from kubernetes-sigs/schrej-patch-1

🐛 bump go version for container images to 1.21

Author: schrej

Dockerfile

@@ -15,7 +15,7 @@
 ARG ARCH
 
 # Build the manager binary
-FROM golang:1.20 as builder
+FROM golang:1.21 as builder
 
 WORKDIR /workspace
 # Copy the Go Modules manifests