Rename method arguments to use camelCase casing (#7)

Backport of joomla/joomla-cms#31168

src/Photo.php

@@ -148,7 +148,7 @@ public function getTags($photo, $limit = 0, $offset = 0, $until = null, $since =
 	}
 
 	/**
-	 * Method to tag one or more Users in a photo. $to or $tag_text required.
+	 * Method to tag one or more Users in a photo. $to or $tagText required.
 	 * Requires authentication and publish_stream permission, user_photos permission for private photos.
 	 *
 	 * @param   string   $photo    The photo id.