chore(deps): update eclipse-temurin docker tag to v21.0.8_9-jdk (#44)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: Thor Tudal Lauridsen <30320530+thorlauridsen@users.noreply.github.com>

Author: renovate[bot]

docker/Dockerfile

@@ -23,7 +23,7 @@ COPY . .
 RUN ./gradlew --no-daemon :api:clean :api:build -x test
 
 # Stage 2: Package the application into a runtime image using temurin JDK 21.
-FROM eclipse-temurin:21.0.7_6-jdk
+FROM eclipse-temurin:21.0.8_9-jdk
 WORKDIR /app
 
 # Copy the generated jar from the builder stage.