Update package version to 4.20.4

pkg.info

@@ -1,9 +1,11 @@
 name: xfce4-settings
 description: Settings manager for the Xfce desktop environment
-version: 4.20.3
+version: 4.20.4
 revision: 1
 url: https://docs.xfce.org/xfce/xfce4-settings/start
 license: GPL2-or-later
+maintainers:
+  - [email protected]
 architecture: any
 type: source
 depends:
@@ -25,4 +27,4 @@ downloads:
   - url: https://archive.xfce.org/src/xfce/xfce4-settings/${BPM_PKG_VERSION%.*}/xfce4-settings-${BPM_PKG_VERSION}.tar.bz2
     extract_to: ${BPM_SOURCE}
     extract_strip_components: 1
-    checksum: f77f79925391b142101bac46e2c48373d87ad73f610af371b8bcf92ba11c6383
+    checksum: ad5c3c5bfb36f5eb091c05897d60f468d0d5cc4364c8d1d38ca53d8bb04387da