Terms: Update description generator for new Faker behavior

With the new version of the Faker library introduced in #147, the
behavior of the `realTextBetween` seems to have changed, making it more
strict in its interpretation of the input parameters. This change avoids
fatal errors by ensuring that there is always a range of 40 between the
specified minimum number of characters and the maximum, so that the
generator can always build a string with a length that falls somewhere
within the range.

Author: coreymckrill

includes/Generator/Term.php

@@ -57,8 +57,10 @@ public static function generate( $save = true, string $taxonomy = 'product_cat',
 			$term_name = strtolower( $term_name );
 		}
 
+		$description_size = wp_rand( 20, 260 );
+
 		$term_args = array(
-			'description' => self::$faker->realTextBetween( 20, wp_rand( 20, 300 ), 4 ),
+			'description' => self::$faker->realTextBetween( $description_size, $description_size + 40, 4 ),
 		);
 		if ( 0 !== $parent ) {
 			$term_args['parent'] = $parent;