Update README.md

Author: rajdeepv

README.md

@@ -39,8 +39,8 @@ Example: parallel_calabash -a my.apk -o 'cucumber_opts_like_tags_profile_etc_her
     -a, --apk apk_path               apk file path
     -d, --distribution-tag tag       divide features into groups as per occurrence of given tag
     -o, --cucumber_opts '[OPTIONS]'  execute with those cucumber options
-    --serialize-stdout           Serialize stdout output, nothing will be written until everything is done
-    --concurrent                 Run tests concurrently. Each test will run once on each device.
+    --serialize-stdout               Serialize stdout output, nothing will be written until everything is done
+    --concurrent                     Run tests concurrently. Each test will run once on each device.
         
 ## REPROTING