doc: add an explicit fetch tag step in release guide
I had some problems generating the CHANGELOG for the 22.5.0 proposal, turned out the reason was my local clone didn't have the v22.4.1 tag.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
I had some problems generating the CHANGELOG for the 22.5.0 proposal, turned out the reason was my local clone didn't have the v22.4.1 tag.