[gnome-keyring/update-readme] readme: Mention libsecret instead of deprecated libgnome-keyring

[Felipe Borges <felipeborges src gnome org>]

commit c36bdbd1befaa97a85b1029f03016c1990a51e19
Author: Felipe Borges <felipeborges gnome org>
Date:   Wed Apr 14 12:49:52 2021 +0200

    readme: Mention libsecret instead of deprecated libgnome-keyring

 README | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/README b/README
index 10491821..20bd46d1 100644
--- a/README
+++ b/README
@@ -6,5 +6,5 @@ The program can manage several keyrings, each with its own master
 password, and there is also a session keyring which is never stored to
 disk, but forgotten when the session ends.
 
-The library libgnome-keyring is used by applications to integrate with
-the GNOME keyring system.
+The library libsecret is used by applications to integrate with the
+GNOME keyring system.