chore(deps): update bellsoft/liberica-openjdk-alpine docker tag to v21.0.6 (#13195)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

benchmark-overhead/Dockerfile-petclinic-base

@@ -13,7 +13,7 @@ RUN git checkout 8aa4d49
 RUN ./mvnw package -Dmaven.test.skip=true
 RUN cp target/spring-petclinic-rest*.jar /app/spring-petclinic-rest.jar
 
-FROM bellsoft/liberica-openjdk-alpine:21.0.5@sha256:45083bf56e4cf13c34c6ec04356deec655638c8aa8443f9dcab7a90fb4db8fb6
+FROM bellsoft/liberica-openjdk-alpine:21.0.6@sha256:fab34f9e4ff5676582c2ed7d23f9a3a63cf7da0b2f9b5285885b849a88862aaf
 COPY --from=app-build /app/spring-petclinic-rest.jar /app/spring-petclinic-rest.jar
 WORKDIR /app
 EXPOSE 9966