Merge pull request #97 from s864372002/hotfix/typo

Typo fixed.

Author: mat007

README.md

@@ -16,7 +16,7 @@ The programs in this repository are written with the Go programming language. Th
 $ go get github.com/docker/docker-credential-helpers
 ```
 
-2 - Use `make` to build the program you want. That will leave any executable in the `bin` directory inside the repository.
+2 - Use `make` to build the program you want. That will leave an executable in the `bin` directory inside the repository.
 
 ```
 $ cd $GOPATH/docker/docker-credentials-helpers