Bump golang from 1.22 to 1.23 in /build

Bumps golang from 1.22 to 1.23.

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

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

Author: dependabot[bot]

build/Dockerfile

@@ -1,5 +1,5 @@
 # syntax=docker/dockerfile:1.8
-FROM golang:1.22 AS builder
+FROM golang:1.23 AS builder
 
 WORKDIR /go/src/github.com/nginxinc/nginx-gateway-fabric
 
@@ -9,7 +9,7 @@ RUN go mod download
 COPY . /go/src/github.com/nginxinc/nginx-gateway-fabric
 RUN make build
 
-FROM golang:1.22 AS ca-certs-provider
+FROM golang:1.23 AS ca-certs-provider
 
 FROM alpine:3.20 AS capabilizer
 RUN apk add --no-cache libcap