📝 Update docs, typos, aclarations, fix examples

for NoSQL models

docs/tutorial/query-params-str-validations.md

@@ -199,4 +199,4 @@ Validations specific for strings:
 
 In these examples you saw how to declare validations for `str` values.
 
-See the next sections to see how to declare validations for other types, like numbers.
+See the next chapters to see how to declare validations for other types, like numbers.