Bump golang from 1.21.6 to 1.22.2

Bumps golang from 1.21.6 to 1.22.2.

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

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

Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.21.6 as builder
+FROM golang:1.22.2 as builder
 WORKDIR /build
 COPY go.mod .
 COPY go.sum .