Update package version to 1.20.4

pkg.info

@@ -1,7 +1,7 @@
 name: xdg-desktop-portal
 description: A portal frontend service for Flatpak and other desktop containment frameworks
-version: 1.20.3
-revision: 5
+version: 1.20.4
+revision: 1
 url: https://flatpak.github.io/xdg-desktop-portal/
 license: LGPL2.1-or-later
 maintainers:
@@ -31,4 +31,4 @@ downloads:
   - url: https://github.com/flatpak/xdg-desktop-portal/releases/download/${BPM_PKG_VERSION}/xdg-desktop-portal-${BPM_PKG_VERSION}.tar.xz
     extract_to: ${BPM_SOURCE}
     extract_strip_components: 1
-    checksum: 4bfb164937f59107eb1a3cc21abaa948d903c76f3b99fac210cea38ce1da9edc
+    checksum: 9528eb3b060b88ac82f294fbdc6af5f4d3adfa42575f2cd816cab3d3e0a7a68c