riken: update benchpark tag to develop-2025-12-15 (#43)

Author: slabasan

2026-RIKEN/docker/Dockerfile.benchpark

@@ -32,7 +32,7 @@ USER ${NB_USER}
 
 RUN git clone https://github.com/LLNL/benchpark.git ${HOME}/benchpark && \
     cd ${HOME}/benchpark && \
-    git checkout -b develop-2025-12-14 develop-2025-12-14 && \
+    git checkout -b develop-2025-12-15 develop-2025-12-15 && \
     git submodule update --init --recursive
 
 USER root