change python3 to python as python3 isn't defined on the windows vm image (2)

Author: nitins17

ci/utilities/run_docker_container.sh

@@ -61,7 +61,7 @@ if ! docker container inspect jax >/dev/null 2>&1 ; then
   if [[ "$(uname -s)" =~ "MSYS_NT" ]]; then
     echo 'Converting MSYS Linux-like paths to Windows paths (for Bazel, Python, etc.)'
     # Convert all "JAXCI.*DIR" variables
-    source <(python3 ./ci/utilities/convert_msys_paths_to_win_paths.py --convert $(env | grep "JAXCI.*DIR" | awk -F= '{print $1}'))
+    source <(python ./ci/utilities/convert_msys_paths_to_win_paths.py --convert $(env | grep "JAXCI.*DIR" | awk -F= '{print $1}'))
   fi
 
   # Start the container.