deps(docker): bump golang in /docker/build

Bumps golang from 1.21-bullseye to 1.22-bullseye.

---
updated-dependencies:
- dependency-name: golang
  dependency-type: direct:production
...

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

docker/build/Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.21-bullseye
+FROM golang:1.22-bullseye
 LABEL maintainer="Tom Manville<tom@kasten.io>"
 
 ARG TARGETPLATFORM