Need some help finding the newest update for HTC One M7

I had rooted my phone a year or so ago. I installed the update for the phone that was recent at the time, but now I need a new update.

Is there one available currently for my phone?

I can't remember all of the information I am supposed to provide to help with the search for it, so I will need some assistance with remembering how to do all of this.

Thank you!