fix: Dockerfile.trtllm - install triton when building from source on arm (#4579)

Signed-off-by: Dmitry Tokarev <dtokarev@nvidia.com>

container/Dockerfile.trtllm

@@ -137,7 +137,7 @@ RUN if [ "$HAS_TRTLLM_CONTEXT" = "1" ]; then \
         # Install from local wheel directory in build context
         WHEEL_FILE="$(find /trtllm_wheel -name "*.whl" | head -n 1)"; \
         if [ -n "$WHEEL_FILE" ]; then \
-            uv pip install --no-cache "$WHEEL_FILE"; \
+            uv pip install --no-cache "$WHEEL_FILE" triton==3.5.0; \
         else \
             echo "No wheel file found in /trtllm_wheel directory."; \
             exit 1; \