README: add info about the subject line for e-mails sent to linux-gpio

For libgpiod-related e-mails the subject line should be prefixed
with [libgpiod].

Signed-off-by: Bartosz Golaszewski <bartekgola@gmail.com>

diff --git a/README b/README
index bd31051fcc5c0df289739bea45bb649b34318a17..be150f200eba94d02d97f586615dcc74ef5faf57 100644 (file)
--- a/README
+++ b/README
@@ -134,5 +134,5 @@ CONTRIBUTING
 ------------
 
 Contributions are welcome - please send patches and bug reports to
-linux-gpio@vger.kernel.org and stick to the linux kernel coding style when
-submitting new code.
+linux-gpio@vger.kernel.org (add the [libgpiod] prefix to the e-mail subject
+line) and stick to the linux kernel coding style when submitting new code.