Bump nginx from 1.27.2-alpine to 1.27.3-alpine in /docker/nginx

Bumps nginx from 1.27.2-alpine to 1.27.3-alpine.

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

Signed-off-by: dependabot[bot] <[email protected]>

docker/nginx/Dockerfile

@@ -1,6 +1,6 @@
 # build args
 
-FROM nginx:1.27.2-alpine AS nginx_build
+FROM nginx:1.27.3-alpine AS nginx_build
 
 # install pkgs
 RUN apk add --update-cache python3 py3-pip jinja2-cli