Docs: fix wrong function name

Author: aichbauer

README.md

@@ -23,14 +23,14 @@ $ yarn add is-git-remote
 ```js
 const isGitRemote = require('is-git-remote'); // import isGitRemote from 'is-git-remote'
 
-countGitTags('www.github.com/username/repo-that-exists'); // => true
+isGitRemote('www.github.com/username/repo-that-exists'); // => true
 
-countGitTags('https://www.github.com/username/repo-that-exists'); // => true
+isGitRemote('https://www.github.com/username/repo-that-exists'); // => true
 
-countGitTags('username/repo-that-exists', 'bitbucket.com'); // => true
+isGitRemote('username/repo-that-exists', 'bitbucket.com'); // => true
 
 // automatically checks github if no host is provided
-countGitTags('username/repo-that-not-exists'); // => false
+isGitRemote('username/repo-that-not-exists'); // => false
 ```
 
 ## LICENSE