add char, varchar2 and sort list in G-8310

Author: PhilippSalvisberg

docs/4-language-usage/8-patterns/3-validating-input-parameter-size/g-8310.md

@@ -9,14 +9,16 @@ This technique raises an error (`value_error`) which may not be handled in the c
 
 To limit the number of false positives, only the following data types used in parameters should be considered:
 
+- `char`
+- `dec`
+- `decimal`
+- `interval day to second`
+- `interval year to month`
 - `nchar`
 - `number`
-- `nvarchar2`
-- `interval year to month`
-- `interval day to second`
 - `numeric`
-- `decimal`
-- `dec`
+- `nvarchar2`
+- `varchar2`
 - `%type`
 
 ## Example (bad)