build: bump nginx from 1.23.3-alpine to 1.23.4-alpine

Bumps nginx from 1.23.3-alpine to 1.23.4-alpine.

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

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

Dockerfile

@@ -36,7 +36,7 @@ RUN git clone https://github.com/nginx-proxy/forego/ \
    && rm -rf /go/forego
 
 # Build the final image
-FROM nginx:1.23.3
+FROM nginx:1.23.4
 
 ARG NGINX_PROXY_VERSION
 # Add DOCKER_GEN_VERSION environment variable

Dockerfile.alpine

@@ -37,7 +37,7 @@ RUN git clone https://github.com/nginx-proxy/forego/ \
    && rm -rf /go/forego
 
 # Build the final image
-FROM nginx:1.23.3-alpine
+FROM nginx:1.23.4-alpine
 
 ARG NGINX_PROXY_VERSION
 # Add DOCKER_GEN_VERSION environment variable