Bump golang from 1.20.3 to 1.20.4 in /hack/ccm (#1224)

Bumps golang from 1.20.3 to 1.20.4.

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: k8s-infra-cherrypick-robot

hack/ccm/Dockerfile

@@ -18,7 +18,7 @@ ARG TARGETPLATFORM=linux/amd64
 ARG ARCH=amd64
 
 # Build IBM cloud controller manager binary
-FROM golang:1.20.3 AS ccm-builder
+FROM golang:1.20.4 AS ccm-builder
 ARG ARCH
 ARG POWERVS_CLOUD_CONTROLLER_COMMIT
 WORKDIR /build