Fix example of FS.setinfo using a wrong Info key (#153)

Author: althonos

fs/base.py

@@ -210,7 +210,7 @@ def setinfo(self, path, info):
 
         Example:
             >>> details_info = {"details": {
-            ...     "modified_time": time.time()
+            ...     "modified": time.time()
             ... }}
             >>> my_fs.setinfo('file.txt', details_info)