Docs: Fix typo in max-params examples (#6471)

Original meaning inferred from earlier statements in the file, the header for the immediate example, and the code for the rule itself (on line 49).

docs/rules/max-params.md

@@ -37,7 +37,7 @@ let foo = (bar, baz, qux, qxx) => {
 };
 ```
 
-Examples of **correct** code for this rule with the default `{ "max": 4 }` option:
+Examples of **correct** code for this rule with the default `{ "max": 3 }` option:
 
 ```js
 /*eslint max-params: ["error", 3]*/