client/container: disable shellcheck warning for DOCKER_FINANCE_DEBUG

If it's not set or set to false, then it's expected to be not true.

client/src/docker/docker.bash

@@ -156,6 +156,8 @@ function main()
   #
 
   lib_docker::docker "$@" || lib_utils::die_usage "$_usage"
+
+  # shellcheck disable=SC2154
   [ "$DOCKER_FINANCE_DEBUG" == true ] && set -xv
 
   #