[Docs] update docs to add encodeDotInKeys behavior when encodeValuesO…

…nly is present

README.md

@@ -435,7 +435,9 @@ qs.stringify({ a: { b: { c: 'd', e: 'f' } } }, { allowDots: true });
 ```
 
 You may encode the dot notation in the keys of object with option `encodeDotInKeys` by setting it to `true`
-Note: it only works with `allowDots` being set to `true`:
+Notes:
+1. it only works with `allowDots` being set to `true`
+2. when `encodeValuesOnly` is provided with `encodeDotInKeys`, it would only encode dots in keys and nothing else.
 ```javascript
 qs.stringify({ "name.obj": { "first": "John", "last": "Doe" } }, { allowDots: true, encodeDotInKeys: true })
 // 'name%252Eobj.first=John&name%252Eobj.last=Doe'