build(deps): bump eclipse-temurin

Bumps eclipse-temurin from 17-jdk-alpine to 21-jdk-alpine.

---
updated-dependencies:
- dependency-name: eclipse-temurin
  dependency-type: direct:production
...

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

examples-ca/channel-operations/deployment/Dockerfile

@@ -1,4 +1,4 @@
-FROM eclipse-temurin:17-jdk-alpine
+FROM eclipse-temurin:21-jdk-alpine
 VOLUME /tmp
 COPY channel-operations.jar app.jar
 ENV JAVA_OPTS="-XX:+UseContainerSupport -XX:MaxRAMPercentage=70 -Djava.security.egd=file:/dev/./urandom"