fix ubi docker: use --nobest flag to resolve boost dependency conflicts (#803)

Switched from --best to --nobest in DNF install command to allow
installation of compatible boost versions when the latest version has
dependency conflicts with boost-program-options.

Signed-off-by: Adam Ghandoura <adam.ghandoura@intel.com>

Author: ghandoura

.cd/Dockerfile.rhel.ubi.vllm

@@ -126,7 +126,7 @@ RUN PT_PACKAGE_NAME="pytorch_modules-v${PT_VERSION}_${SYNAPSE_VERSION}_${SYNAPSE
     rm -rf "${TMP_PATH}" "${PT_PACKAGE_NAME}"
 
 # System update
-RUN dnf -y update --best --allowerasing --skip-broken && \
+RUN dnf -y update --nobest --allowerasing --skip-broken && \
     dnf clean all
 
 WORKDIR /workspace