fix(docker): bump nginx in the docker-deps group

Bumps the docker-deps group with 1 update: nginx.


Updates `nginx` from 1.27.3-alpine-slim to 1.27.4-alpine-slim

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

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

Author: dependabot[bot]

Dockerfile

@@ -24,7 +24,7 @@ RUN mkdir /ejks \
 RUN find /ejks -type f -name '*.html' | sed 's#/ejks#https://ejks.sk#g' | sort -u > /ejks/sitemap.txt
 
 # Runtime container
-FROM nginx:1.27.3-alpine-slim
+FROM nginx:1.27.4-alpine-slim
 
 # Replace default configuration
 COPY nginx-default-server.conf /etc/nginx/conf.d/default.conf