[gnome-runtime-images] Revert "Update flat-mngr-client version"

[Jordan Petridis <jpetridis src gnome org>]

commit 8cd14ca3c7f962d2b68ec98df6d42351dcbc8d45
Author: Jordan Petridis <jpetridis gnome org>
Date:   Wed Oct 14 17:56:19 2020 +0000

    Revert "Update flat-mngr-client version"
    
    This reverts commit 488f0f2cd1c8e286bb43c80d95a1e5cd60b7e109

 flat-manager-client/Dockerfile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/flat-manager-client/Dockerfile b/flat-manager-client/Dockerfile
index 5417a71..320ea76 100644
--- a/flat-manager-client/Dockerfile
+++ b/flat-manager-client/Dockerfile
@@ -8,5 +8,5 @@ RUN dnf -y update && \
     dnf clean all
 
 RUN curl -o /usr/bin/flat-manager-client \
-    https://raw.githubusercontent.com/flatpak/flat-manager/0.3.7/flat-manager-client && \
+    https://raw.githubusercontent.com/flatpak/flat-manager/0.3.4/flat-manager-client && \
     chmod a+x /usr/bin/flat-manager-client