Fix typo in README.md

README.md

 
 #### Android Media Scanner, and Downloads App Support
 
-If you want to make a file in `External Storage` becomes visible in Picture, Misuc, or other built-in apps, you will have to use `Media Scanner`. To make this happend, use `scanFile` method in `fs`.
+If you want to make a file in `External Storage` becomes visible in Picture, Music, or other built-in apps, you will have to use `Media Scanner`. To make this happend, use `scanFile` method in `fs`.
 
 
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