docs(opencollective): note that the payment process has been updated

people should re-read it, update comment to say same

.github/workflows/opencollective_notices.yml

@@ -51,6 +51,8 @@ jobs:
 
                       https://github.com/ankidroid/Anki-Android/wiki/OpenCollective-Payment-Process#how-to-get-paid
 
+                      PLEASE NOTE: The process was updated in August 2024. You should re-read the Payment Process page.
+
                       We only post one comment per person per month to avoid spamming you, regardless of the number of PRs merged, but this note applies to all PRs merged for this month
 
                       Please understand that our monthly budget is never guaranteed to cover all claims - the cap on payments-per-person may be lower, but we try to make our process as fair and transparent as possible, we just need your understanding.