Bump golang from 1.19.0 to 1.22.6 in /build/protoc-go

Bumps golang from 1.19.0 to 1.22.6.

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

Signed-off-by: dependabot[bot] <[email protected]>

build/protoc-go/Dockerfile

@@ -3,7 +3,7 @@
 #
 # SPDX-License-Identifier: Apache-2.0
 
-FROM golang:1.19.0
+FROM golang:1.22.6
 
 RUN apt-get update && \
     apt-get install -y unzip python3 python3-pip