[orca] Fix pygi warning resulting from changing import order in last commit

[Joanmarie Diggs <joanied src gnome org>]

commit af80cefcac325b5d2ef1913f712220f8ae331184
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Mon Feb 1 16:22:17 2021 +0100

    Fix pygi warning resulting from changing import order in last commit

 src/orca/orca_bin.py.in | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/src/orca/orca_bin.py.in b/src/orca/orca_bin.py.in
index b590f81fa..8c9d40153 100644
--- a/src/orca/orca_bin.py.in
+++ b/src/orca/orca_bin.py.in
@@ -185,6 +185,8 @@ def inGraphicalDesktop():
 
     # TODO - JD: Make this desktop environment agnostic
     try:
+        import gi
+        gi.require_version("Gdk", "3.0")
         from gi.repository import Gdk
         display = Gdk.Display.get_default()
     except: