05_sumAll: Update README.md (TheOdinProject#475)

* Change 'integers' to 'positive integers' in question statement

* requested changes

* requested changes

* requested changes

Author: shubhatRashid

04_removeFromArray/removeFromArray.js

@@ -1,5 +1,4 @@
 const removeFromArray = function() {
-
 };
 
 // Do not edit below this line

05_sumAll/README.md

@@ -1,6 +1,6 @@
 # Exercise 05 - sumAll
 
-Implement a function that takes 2 integers and returns the sum of every number between(and including) them:
+Implement a function that takes 2 positive integers and returns the sum of every number between (and including) them:
 
 ```javascript
 sumAll(1, 4) // returns the sum of 1 + 2 + 3 + 4 which is 10