Bump nginx from 1.25.4-alpine to 1.25.5-alpine in /nginx

Bumps nginx from 1.25.4-alpine to 1.25.5-alpine.

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

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

nginx/Dockerfile

@@ -1,5 +1,5 @@
 # Get nginx stable Alpine.
-FROM nginx:1.25.4-alpine
+FROM nginx:1.25.5-alpine
 
 # Get packages.
 RUN apk update && apk add openssl