Bump nginxcontrib/nginx from 1.23.3-ubi to 1.23.4-ubi in /build

Bumps nginxcontrib/nginx from 1.23.3-ubi to 1.23.4-ubi.

---
updated-dependencies:
- dependency-name: nginxcontrib/nginx
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

build/Dockerfile

@@ -103,7 +103,7 @@ RUN --mount=type=secret,id=nginx-repo.crt,dst=/etc/ssl/nginx/nginx-repo.crt,mode
 
 
 ############################################# Base image for UBI #############################################
-FROM nginxcontrib/nginx:1.23.3-ubi AS ubi
+FROM nginxcontrib/nginx:1.23.4-ubi AS ubi
 ARG IC_VERSION
 
 LABEL name="NGINX Ingress Controller" \