src/Taggable.php
public static function renameTag(string $oldTag, string $newTag): int
    {
        return app(TagService::class)->renameTags($oldTag, $newTag, static::class);
    }
public static function renameTag(string $oldTag, string $newTag): int
    {
        return app(TagService::class)->renameTags($oldTag, $newTag, static::class);
    }
Rename one the tags for the called class.

@param string $oldTag
@param string $newTag

@return int