build: bump nginxproxy/docker-gen from 0.15.0 to 0.15.1

Bumps nginxproxy/docker-gen from 0.15.0 to 0.15.1.

---
updated-dependencies:
- dependency-name: nginxproxy/docker-gen
  dependency-version: 0.15.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

Dockerfile

@@ -1,5 +1,5 @@
 # syntax=docker/dockerfile:1
-FROM docker.io/nginxproxy/docker-gen:0.15.0 AS docker-gen
+FROM docker.io/nginxproxy/docker-gen:0.15.1 AS docker-gen
 
 FROM docker.io/library/alpine:3.22.1