RANGER-5521:Fix incorrect chmod command in docker readme.md (#877)

Author: ChinmayHegde24

dev-support/ranger-docker/README.md

@@ -51,7 +51,7 @@ Use Dockerfiles in this directory to create docker images and run them to build
 Execute following command to build Apache Ranger:
 ~~~
 
-chmod +x scripts/*.sh
+chmod +x scripts/**/*.sh
 
 # optional step: a fresh build ensures that the correct jdk version is used
 docker compose -f docker-compose.ranger-build.yml build