build(deps): bump golang in /examples/shared/golang

Bumps golang from 1.20.5-bullseye to 1.23.0-bullseye.

---
updated-dependencies:
- dependency-name: golang
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

examples/shared/golang/Dockerfile

@@ -3,7 +3,7 @@ RUN rm -f /etc/apt/apt.conf.d/docker-clean \
     && echo 'Binary::apt::APT::Keep-Downloaded-Packages "true";' | tee /etc/apt/apt.conf.d/keep-cache
 
 
-FROM golang:1.20.5-bullseye@sha256:419bc8954c0e08c539830c8669ccd116a063303481c748fabd09d8fd6d4e2c5f as golang-base
+FROM golang:1.23.0-bullseye@sha256:f8d91a8717c3f06dee141a020cb9640327fe614b9afaf90188a0cc1d0a43c471 as golang-base
 
 
 FROM golang-base as golang-control-plane-builder