Mention KWallet instead of KSecretsService

KSecretsService is dead, and KWallet got Secret Service support recently:
https://invent.kde.org/frameworks/kwallet/-/merge_requests/11

README.rst

@@ -14,7 +14,7 @@ Module description
 This module provides a way for securely storing passwords and other secrets.
 
 It uses D-Bus `Secret Service`_ API that is supported by GNOME Keyring,
-KSecretsService and KeePassXC.
+KWallet (since version 5.97) and KeePassXC.
 
 The main classes provided are ``secretstorage.Item``, representing a secret
 item (that has a *label*, a *secret* and some *attributes*) and

docs/index.rst

@@ -7,7 +7,7 @@ secrets.
 
 It uses `D-Bus`_-based FreeDesktop.org `Secret Service`_ standard that is,
 for example, supported by `GNOME Keyring`_ (since version 2.30),
-KSecretsService_ and KeePassXC_.
+KWallet_ (since version 5.97) and KeePassXC_.
 
 It allows one to create new secret items, delete and search for
 passwords matching given attributes. It also supports graphical prompts
@@ -16,7 +16,7 @@ when unlocking is needed.
 .. _`D-Bus`: https://www.freedesktop.org/wiki/Software/dbus
 .. _`Secret Service`: https://specifications.freedesktop.org/secret-service/
 .. _`GNOME Keyring`: https://wiki.gnome.org/Projects/GnomeKeyring
-.. _KSecretsService: https://community.kde.org/KDE_Utils/ksecretsservice
+.. _KWallet: https://invent.kde.org/frameworks/kwallet
 .. _KeePassXC: https://avaldes.co/2020/01/28/secret-service-keepassxc.html
 
 SecretStorage code is hosted on GitHub_.