Bump eclipse-temurin from 21-jre-alpine to 25-jre-alpine

Bumps eclipse-temurin from 21-jre-alpine to 25-jre-alpine.

---
updated-dependencies:
- dependency-name: eclipse-temurin
  dependency-version: 25-jre-alpine
  dependency-type: direct:production
...

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

Author: dependabot[bot]

backend.Dockerfile

@@ -30,7 +30,7 @@ RUN ./scripts/build_backend_version.sh `cat git_describe.txt`
 
 
 # Runner
-FROM eclipse-temurin:21-jre-alpine AS runner
+FROM eclipse-temurin:25-jre-alpine AS runner
 
 ## Apache POI needs some extra libs to auto-size columns
 RUN apk add --no-cache fontconfig ttf-dejavu