chore: bump sam/build-java25 (aws-powertools#2669)

Bumps the e2e test base image sam/build-java25 to the current latest digest. Reviewed and approved by @phipag. Review performed by Claude.

Author: dependabot[bot]

powertools-e2e-tests/src/test/resources/docker/Dockerfile

@@ -1,5 +1,5 @@
 # Use the official AWS SAM base image for Java 25
-FROM public.ecr.aws/sam/build-java25@sha256:2d12901216407d134e365446f33200b0915d44f7a11d1d84ce9dec40b76bb8da
+FROM public.ecr.aws/sam/build-java25@sha256:35c398d9eaadd173262573be05ba7e1c3eda552a5bd320659b7b1442632b47df
 
 # Install GraalVM dependencies
 RUN curl -4 -L https://download.oracle.com/graalvm/25/latest/graalvm-jdk-25_linux-x64_bin.tar.gz | tar -xvz