doc: encourage review replies before rerolling

doc: encourage review replies before rerolling

Review feedback should not be answered only by sending a new patch
version. Encourage contributors to discuss their planned response in the
mailing-list thread before rerolling.

This makes the author's reasoning explicit before the next version is
prepared, instead of forcing reviewers to infer it from the rerolled
patches. It also encourages more direct social interaction between
contributors and helps foster a more collaborative review process.

Signed-off-by: Weijie Yuan <redacted>
Signed-off-by: Junio C Hamano <redacted>