Bump redhat/ubi9 from 9.3 to 9.4 (#87)

Bumps redhat/ubi9 from 9.3 to 9.4.

---
updated-dependencies:
- dependency-name: redhat/ubi9
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Dockerfile

@@ -1,7 +1,7 @@
 # syntax=docker/dockerfile:1.6
 FROM nginx:1.25.5 as nginx
 
-FROM redhat/ubi9:9.3 as rpm-build
+FROM redhat/ubi9:9.4 as rpm-build
 ARG NGINX
 ARG NJS
 ENV NGINX_VERSION ${NGINX}