[TF-M] Update to TF-M Technical Forum Scheduling

Hi All,

I wanted to inform you about a change to the TF-M Technical Forum meeting schedule.

Previously, we held sessions every two weeks, alternating between Eastern and Western-friendly time zones to accommodate our global audience. After reviewing participation patterns we've decided to simplify the schedule to a monthly cadence, with meetings held in a Western-friendly time slot. We hope this update makes participation more predictable and better aligned with current engagement.

Everyone is still very welcome to attend, and as always, recordings and notes will be available for those unable to join live.

Best regards, Anton