[Mesa-dev] [MR] Update README to recommend MRs instead of `git send-email`

[Eric Engestrom]

Hi,

I sent an MR to update the README, but as pointed out there I should
make sure people who don't look at MRs are also aware of it, so here is:

https://gitlab.freedesktop.org/mesa/mesa/merge_requests/1223

---8<---
diff --git a/README.rst b/README.rst
index 4ccd72eca38a0845571c..eba097e652edde48a735 100644
--- a/README.rst
+++ b/README.rst
@@ -56,5 +56,6 @@ Contributions are welcome, and step-by-step instructions can be found in our
 documentation (`docs/submittingpatches.html
 <https://mesa3d.org/submittingpatches.html>`_).
 
-Note that Mesa uses email mailing-lists for patches submission, review and
-discussions.
+We recommend using GitLab Merge Requests (MRs) for patch submission and
+review, and email mailing-lists for discussions, but the old `git send-email`
+method is still accepted.
--->8---