Change meeting time for the Prometheus SIG

[dashpole]

We discussed on slack, and would like to move our SIG meeting to Friday, 1:30pm- 2:30pm 4-5pm UTC

https://cloud-native.slack.com/archives/C01LSCJBXDZ/p1759934869764809

cc @open-telemetry/prometheus-interoperability @ArthurSens @ywwg

[ArthurSens]

Hey, sorry folks. This time really doesn't work for me 😭. Can we retry finding a time that works?

[ArthurSens]

Ok, sounds like we agreed to move to 4-5 PM UTC :)