Bump golang from 1.26.1 to 1.26.2 in /dockerfiles/gh-cli

Bumps golang from 1.26.1 to 1.26.2.

---
updated-dependencies:
- dependency-name: golang
  dependency-version: 1.26.2
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

dockerfiles/gh-cli/Dockerfile

@@ -11,5 +11,5 @@ RUN curl \
     https://github.com/cli/cli/releases/download/v2.40.0/gh_2.40.0_linux_amd64.tar.gz \
     && tar -C /tmp --strip-components=1 -xzvf /tmp/gh.tar.gz
 
-FROM golang:1.26.1
+FROM golang:1.26.2
 COPY --from=builder /tmp/bin/gh /usr/local/bin/gh