fix: typo QueySet -> QuerySet (#656)

Co-authored-by: Benjamin Mollier <benjamin.mollier@meetap.de>

docs/queries/pagination-and-rows-number.md

@@ -69,7 +69,7 @@ tracks = await Track.objects.limit(1).all()
 ```
 
 !!!note
-    All methods that do not return the rows explicitly returns a QueySet instance so you can chain them together
+    All methods that do not return the rows explicitly returns a QuerySet instance so you can chain them together
     
     So operations like `filter()`, `select_related()`, `limit()` and `offset()` etc. can be chained.
     
@@ -103,7 +103,7 @@ tracks = await Track.objects.offset(1).limit(1).all()
 ```
 
 !!!note
-    All methods that do not return the rows explicitly returns a QueySet instance so you can chain them together
+    All methods that do not return the rows explicitly returns a QuerySet instance so you can chain them together
     
     So operations like `filter()`, `select_related()`, `limit()` and `offset()` etc. can be chained.