Added random_modulo documentation.

Author: Helios-vmg

src/content/docs/build/smart-contracts/linter.mdx

@@ -271,6 +271,10 @@ and
 };
 ```
 
+### `random_modulo`
+
+Checks for expressions of the form `u{8|16|32|64|128|256}_integer() % x`. Getting the remainder of a division where the dividend is a random number results in a non-uniform distribution. For example, the result of `u8_integer() % 255` is twice as likely to be 0 than 1. Instead of wrapping with modulo, `u{8|16|32|64|128|256}_range(0, x)` can be used, which produces a uniform distribution.
+
 ### `self_assignment`
 
 Checks for patterns where a variable or a field of a struct is assigned to itself and suggests removing the assignment. These assignments do not affect the state of the program. Examples include: