Fix XML SPDX header.

- remove Talk

Signed-off-by: ZetaTom <70907959+ZetaTom@users.noreply.github.com>

CONTRIBUTING.md

@@ -198,7 +198,7 @@ Source code of app:
  XML (layout) file:
  ```xml
 <!--
-  ~ Nextcloud Talk - Android Client
+  ~ Nextcloud - Android Client
   ~ 
   ~ SPDX-FileCopyrightText: 2024 Your name <your@email.com>
   ~ SPDX-License-Identifier: AGPL-3.0-or-later OR GPL-2.0-only

app/lint.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!--
-  ~ Nextcloud Talk - Android Client
+  ~ Nextcloud - Android Client
   ~ 
   ~ SPDX-FileCopyrightText: 2022-2024 Nextcloud GmbH and Nextcloud contributors
   ~ SPDX-FileCopyrightText: 2022 Andy Scherzinger <info@andy-scherzinger.de>

app/src/main/res/layout/notification_list_item.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!--
-  ~ Nextcloud Talk - Android Client
+  ~ Nextcloud - Android Client
   ~
   ~ SPDX-FileCopyrightText: 2018-2024 Nextcloud GmbH and Nextcloud contributors
   ~ SPDX-FileCopyrightText: 2023 Andy Scherzinger <info@andy-scherzinger.de>

app/src/main/res/xml/backup_rules.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!--
-  ~ Nextcloud Talk - Android Client
+  ~ Nextcloud - Android Client
   ~
   ~ SPDX-FileCopyrightText: 2022-2024 Nextcloud GmbH and Nextcloud contributors
   ~ SPDX-FileCopyrightText: 2022 Tobias Kaminsky <tobias@kaminsky.me>

app/src/main/res/xml/dashboard_widget_info.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!--
-  ~ Nextcloud Talk - Android Client
+  ~ Nextcloud - Android Client
   ~
   ~ SPDX-FileCopyrightText: 2022-2024 Nextcloud GmbH and Nextcloud contributors
   ~ SPDX-FileCopyrightText: 2022 Tobias Kaminsky <tobias@kaminsky.me>

app/src/main/res/xml/exposed_filepaths.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!--
-  ~ Nextcloud Talk - Android Client
+  ~ Nextcloud - Android Client
   ~
   ~ SPDX-FileCopyrightText: 2017-2024 Nextcloud GmbH and Nextcloud contributors
   ~ SPDX-FileCopyrightText: 2019 Chris Narkiewicz <hello@ezaquarii.com>

app/src/main/res/xml/network_security_config.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!--
-  ~ Nextcloud Talk - Android Client
+  ~ Nextcloud - Android Client
   ~
   ~ SPDX-FileCopyrightText: 2017-2024 Nextcloud GmbH and Nextcloud contributors
   ~ SPDX-FileCopyrightText: 2017 Andy Scherzinger <info@andy-scherzinger.de>