chore(deps): update container image lscr.io/linuxserver/rdesktop to fedora-xfce@a4c39a9 (#15409)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| lscr.io/linuxserver/rdesktop | digest | `2467634` -> `a4c39a9` |

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charts/stable/rdesktop/values.yaml

@@ -8,7 +8,7 @@ ubuntuXFCEImage:
   pullPolicy: Always
 fedoraXFCEImage:
   repository: lscr.io/linuxserver/rdesktop
-  tag: fedora-xfce@sha256:2467634f25bb2645c92e9252c4680b27496d8f2419f48f326bb2b64a9277e601
+  tag: fedora-xfce@sha256:a4c39a9dfd43d432b5637dfd304953e128a6d259fd6c24f2c27c9197e7f7e276
   pullPolicy: Always
 archXFCEImage:
   repository: lscr.io/linuxserver/rdesktop