build(docker): bump nginx from 1.21.3-alpine to 1.21.4-alpine

Bumps nginx from 1.21.3-alpine to 1.21.4-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.web

@@ -14,5 +14,5 @@ ARG VERSION
 RUN npm run build
 
 # production environment
-FROM nginx:1.21.3-alpine as production-stage
+FROM nginx:1.21.4-alpine as production-stage
 COPY --chown=nginx:nginx --from=build-stage /app/dist /usr/share/nginx/html