git: 67783db661f8 - main - CONTRIBUTING: request only one submission type per change

The branch main has been updated by emaste:

URL: https://cgit.FreeBSD.org/src/commit/?id=67783db661f88cf5259c19bb59ddee9e076007ac

commit 67783db661f88cf5259c19bb59ddee9e076007ac
Author:     Ed Maste <emaste@FreeBSD.org>
AuthorDate: 2024-04-18 18:38:54 +0000
Commit:     Ed Maste <emaste@FreeBSD.org>
CommitDate: 2024-04-18 19:13:15 +0000

    CONTRIBUTING: request only one submission type per change
    
    We have some instances of contributors opening a GitHub pull request and
    a Phabricator review for the same change, which divides or duplicates
    review effort.
    
    Reviewed by:    markj
    Sponsored by:   The FreeBSD Foundation
    Differential Revision: https://reviews.freebsd.org/D44856
---
 CONTRIBUTING.md | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 7dcdc1b49685..c26b1d335c5f 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -18,6 +18,10 @@ The preferred method depends on a few factors including the size or scope of
 the change.  GitHub pull requests are preferred for relatively straightforward
 changes where the contributor already has a GitHub account.
 
+A change should be submitted by only one method.  For example, please do not
+open a GitHub pull request and create a Phabricator review for the same change
+(unless explicitly requested to do so by a FreeBSD committer).
+
 ## GitHub Pull Requests
 
 Presently, GitHub 'freebsd-src' repository is one of the publish-only services