Bump node from 24-alpine to 25-alpine in /webui

Bumps node from 24-alpine to 25-alpine.

---
updated-dependencies:
- dependency-name: node
  dependency-version: 25-alpine
  dependency-type: direct:production
...

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

Author: dependabot[bot]

webui/Dockerfile

@@ -1,5 +1,5 @@
 # Build stage
-FROM node:24-alpine AS build
+FROM node:25-alpine AS build
 
 WORKDIR /app