Update FAQ with model speed improvement tips

Author: velezbeltran

README.md

@@ -101,6 +101,7 @@ See the documentation for more information on available methods and parameters.
 ## FAQ:
 
 **Question**: I am having issues with the speed of the model. What do I do?
+
 **Answer**: Some users have reported problems with the sampling speed. If, this is your case reduce either of these two hyper-parameters: `n_estimators` or `early_stopping_rounds`. 
 
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