Update installation path for flatpak.xsh

Author: anki-code

io.github.xonsh.xonsh.yml

@@ -65,7 +65,7 @@ modules:
     buildsystem: simple
     build-commands:
       - pip3 install --prefix=/app --no-build-isolation .
-      - install -Dm644 flatpak.xsh /app/etc/xonsh/rc.d/flatpak.xsh
+      - install -Dm644 flatpak.xsh /etc/xonsh/rc.d/flatpak.xsh
       - install -Dm755 host-spawn /app/libexec/host-spawn
       - |
         mkdir -p /app/libexec/host-cmds