Bump golang from 1.23.0 to 1.23.1 in /cmd/webhook

Bumps golang from 1.23.0 to 1.23.1.

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

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

cmd/webhook/Dockerfile

@@ -14,7 +14,7 @@
 # limitations under the License.
 
 # Build webhook go binary
-FROM golang:1.22.7 AS webhook-builder
+FROM golang:1.23.1 AS webhook-builder
 
 ARG STAGINGVERSION