fixed typo

Author: skywind3000

README.md

@@ -283,7 +283,7 @@ NOTE: For fish shell, this feature requires fish 2.7.0 or above. You can specify
 New option `"-b"` can quickly go back to a specific parent directory in bash instead of typing "cd ../../.." redundantly.
 
 - **(No argument)**: `cd` into the project root, the project root is one of the parent directory with `.git`/`.hg`/`.svn` in it
-- **(One argument)**: `cd` into the closest parent starting with keyword, if not find, goto the parent containing keywords.
+- **(One argument)**: `cd` into the closest parent starting with keyword, if not find, goto the parent containing keyword.
 - **(Two arguments)**: replace the first value with the second one (in the current path).
 
 Let's start by aliasing `z -b` to `zb`: