[connections/use-branch-in-git-submodule] .gitmodules: Use stable branch for submodules

[Felipe Borges <felipeborges src gnome org>]

commit e7a6a95bb167d1e8eeb3165fcdd0dd7ae72d385c
Author: Felipe Borges <felipeborges gnome org>
Date:   Thu Aug 12 10:56:23 2021 +0200

    .gitmodules: Use stable branch for submodules

 .gitmodules | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/.gitmodules b/.gitmodules
index ce36526..12a06fd 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,4 @@
 [submodule "subprojects/gtk-frdp"]
        path = subprojects/gtk-frdp
        url = https://gitlab.gnome.org/gnome/gtk-frdp.git
+       branch = gtk-frdp-0-1