Update go fix vulnerability 2

Description

Just go update.

applications/venv-manager/venv-manager.Dockerfile

@@ -2,7 +2,7 @@ ARG GOLANG_VERSION=1.20.6
 ARG BUILDARGS
 ARG $GITLAB_PROXY=code.fbi.h-da.de:443/danet/dependency_proxy/containers
 
-FROM ${GITLAB_PROXY}golang:$GOLANG_VERSION-buster AS builder
+FROM ${GITLAB_PROXY}golang:$GOLANG_VERSION-bullseye AS builder
 
 WORKDIR /gosdn