Bump golang from 1.20.4-bullseye to 1.20.6-bullseye

Bumps golang from 1.20.4-bullseye to 1.20.6-bullseye.

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

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

Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.20.4-bullseye as permset
+FROM golang:1.20.6-bullseye as permset
 WORKDIR /src
 RUN git clone https://github.com/jacobalberty/permset.git /src && \
     mkdir -p /out && \