Merge pull request #26112 from siteshwar/fix-shellcheck

Fix a shellcheck warning about word splitting

Author: openshift-merge-bot[bot]

docker/podman-docker.sh

@@ -1,7 +1,7 @@
 # DOCKER_HOST initialization
 
 if [ -z "${DOCKER_HOST-}" ]; then
-    if [ $(id -u) -eq 0 ]; then
+    if [ "$(id -u)" -eq 0 ]; then
 	export DOCKER_HOST=unix:///run/podman/podman.sock
     else
 	if [ -n "${XDG_RUNTIME_DIR-}" ]; then