feat: add desktop 7.1 (#5107)

Enable the desktop client 7.1 documentation version. Adds the '7.1'
branch of docs-client-desktop to the build and points the desktop
version attributes at 7.1 (previous: 6.0). 5.3 is intentionally kept
published as it is still widely used.

Signed-off-by: Thomas Müller <1005065+DeepDiver1975@users.noreply.github.com>
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>

Author: DeepDiver1975

global-attributes.yml

@@ -62,8 +62,8 @@
     latest-webui-version: 'next'
     previous-webui-version: 'next'
 #   desktop
-    latest-desktop-version: '6.0'
-    previous-desktop-version: '5.3'
+    latest-desktop-version: '7.1'
+    previous-desktop-version: '6.0'
 #   ios-app
     latest-ios-version: '12.7'
     previous-ios-version: '12.6'

site.yml

@@ -31,6 +31,7 @@ content:
   - url: https://github.com/owncloud/docs-client-desktop.git
     branches:
     - master
+    - '7.1'
     - '6.0'
     - '5.3'
   - url: https://github.com/owncloud/docs-client-ios-app.git