bump kubernetes version

Author: kvaps

build/tools/Dockerfile

@@ -1,7 +1,7 @@
 FROM docker.io/library/alpine:3.12
 
 RUN apk add --no-cache openssl
-ARG VERSION=v1.19.0
+ARG VERSION=v1.19.1
 RUN wget "https://storage.googleapis.com/kubernetes-release/release/${VERSION}/bin/linux/amd64/kubectl" \
       -O /usr/local/bin/kubectl \
  && chmod +x /usr/local/bin/kubectl