One more quick OS update for the BlackBerry (NSDQ: RIMM) users out there. This time around we have an official OS release for the BlackBerry Bold. It comes to us via MobiTel in Bulgaria, and takes things to 4.6.0.303. Should be a groovy update for the Bold users that haven’t been updating with leaked 5.0 builds. However, as always, be sure to backup your device and take all necessary…