[Bugfix] Fix casing warning (vllm-project#21468)

Signed-off-by: Matthew Bonanni <[email protected]>
Signed-off-by: Paul Pak <[email protected]>

Author: MatthewBonanni

docker/Dockerfile

@@ -265,7 +265,7 @@ RUN if [ "$RUN_WHEEL_CHECK" = "true" ]; then \
 #################### EXTENSION Build IMAGE ####################
 
 #################### DEV IMAGE ####################
-FROM base as dev
+FROM base AS dev
 
 ARG PIP_INDEX_URL UV_INDEX_URL
 ARG PIP_EXTRA_INDEX_URL UV_EXTRA_INDEX_URL