Github: Belated warning about 24.11 freeze.

Signed-off-by: Rusty Russell <[email protected]>

Author: rustyrussell

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,10 +1,10 @@
 > [!IMPORTANT]
-> Open for merging new PRs until the next PR freeze date is confirmed!
+> 24.11 FREEZE NOVEMBER 7TH: Non-bugfix PRs not ready by this date will wait for 25.02.
 
 ## Checklist
 Before submitting the PR, ensure the following tasks are completed. If an item is not applicable to your PR, please mark it as checked:
 
 - [ ] The changelog has been updated in the relevant commit(s) according to the [guidelines](https://docs.corelightning.org/docs/coding-style-guidelines#changelog-entries-in-commit-messages).
 - [ ] Tests have been added or modified to reflect the changes.
 - [ ] Documentation has been reviewed and updated as needed.
-- [ ] Related issues have been listed and linked, including any that this PR closes.
+- [ ] Related issues have been listed and linked, including any that this PR closes.