docs: add missing backticks to no-else-return (#19309)

Author: lumirlumir

docs/src/rules/no-else-return.md

@@ -19,14 +19,14 @@ function foo() {
 
 ## Rule Details
 
-This rule is aimed at highlighting an unnecessary block of code following an `if` containing a return statement. As such, it will warn when it encounters an `else` following a chain of `if`s, all of them containing a `return` statement.
+This rule is aimed at highlighting an unnecessary block of code following an `if` containing a `return` statement. As such, it will warn when it encounters an `else` following a chain of `if`s, all of them containing a `return` statement.
 
 ## Options
 
 This rule has an object option:
 
-* `allowElseIf: true` (default) allows `else if` blocks after a return
-* `allowElseIf: false` disallows `else if` blocks after a return
+* `allowElseIf: true` (default) allows `else if` blocks after a `return`
+* `allowElseIf: false` disallows `else if` blocks after a `return`
 
 ###  allowElseIf: true