Update eclipse-temurin Docker tag

This MR contains the following updates:

Package	Type	Update	Change
eclipse-temurin	final	patch	21-jre-alpine -> 21.0.7_6-jre-alpine
eclipse-temurin	stage	patch	21-jdk-jammy -> 21.0.7_6-jdk-jammy

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Dockerfile

-FROM eclipse-temurin:21-jdk-jammy AS builder
+FROM eclipse-temurin:21.0.7_6-jdk-jammy AS builder
 
 COPY . /build/
 WORKDIR /build/
@@ -6,7 +6,7 @@ WORKDIR /build/
 RUN chmod +x ./gradlew \
     && ./gradlew -Dorg.gradle.daemon=false build -x test
 
-FROM eclipse-temurin:21-jre-alpine
+FROM eclipse-temurin:21.0.7_6-jre-alpine
 
 LABEL maintainer=nmaas@lists.geant.org