fix: add missing return statement from deprecated 'for()' method (#49)

Follow-up PR from #46. Forgot to return from the deprecated method.

Reviewed-on: https://codeberg.org/vlw/php-mysql/pulls/49

README.md

@@ -15,7 +15,7 @@ which would be equivalent to the following in MySQL:
 SELECT `columns` FROM `table` WHERE `filter` ORDER BY `order_by` LIMIT `limit`;
 ```
 
-- All methods can be chained in any order (even multiple times) after a [`for()`](#for) as long as a [`select()`](#select), [`insert()`](#insert), [`update()`](#update), or [`delete()`](#delete) is the last method.
+- All methods can be chained in any order (even multiple times) after a [`from()`](#from) as long as a [`select()`](#select), [`insert()`](#insert), [`update()`](#update), or [`delete()`](#delete) is the last method.
 - Chaining the same method more than once will override its previous value. Passing `null` to any method that accepts it will unset its value completely.
 
 ## Install from composer

src/MySQL.php

@@ -81,7 +81,7 @@
 			since: "3.5.7",
 		)]
 		public function for(string $table): self {
-			$this->from($table);
+			return $this->from($table);
 		}
 
 		// Create a WHERE statement from filters