Bump maven from 3.9-eclipse-temurin-21 to 3-eclipse-temurin-25

Bumps maven from 3.9-eclipse-temurin-21 to 3-eclipse-temurin-25.

---
updated-dependencies:
- dependency-name: maven
  dependency-version: 3-eclipse-temurin-25
  dependency-type: direct:production
...

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

Author: dependabot[bot]

backend.Dockerfile

@@ -7,7 +7,7 @@ COPY .git .
 RUN git describe --tags |  sed 's/^v//' > git_describe.txt
 
 # Builder
-FROM maven:3.9-eclipse-temurin-21 AS builder
+FROM maven:3-eclipse-temurin-25 AS builder
 
 WORKDIR /app