docs(merge_two): add extra line at EOF and more details about the type of values

subjects/devops/merge_two/README.md

@@ -6,6 +6,7 @@ One very useful data structure in Python are the dictionaries, in this exercise
 
 Create a file `merge_two.py` which will have a function named `merge_two()`. This function will accept one dictionary.
 It will prompt the user to create a new dictionary asking for keys and values.
+The function will always convert the `values` into integers.
 
 As a return it will create a third one which will be the merge of the two dictionaries and return it as a serialized JSON string.
 
@@ -70,4 +71,4 @@ $
 
 - [Merging dictionaries in Python](https://www.geeksforgeeks.org/python-merging-two-dictionaries/)
 - [JSON library in Python](https://docs.python.org/3/library/json.html)
-- [Function input() in Python](https://www.w3schools.com/python/ref_func_input.asp)
+- [Function input() in Python](https://www.w3schools.com/python/ref_func_input.asp)