[gtk/wip/color-picker] Call the PickColor method instead of ScreenshotPixel

[Matthias Clasen <matthiasc src gnome org>]

commit 1a99e760a04b0b25b2965239243286df58fe8ff7
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu Jul 26 00:05:11 2018 -0400

    Call the PickColor method instead of ScreenshotPixel
    
    This is a better method name, and what we're going
    to go with.

 gtk/gtkcoloreditor.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/gtk/gtkcoloreditor.c b/gtk/gtkcoloreditor.c
index 23080e71ba..733c29c080 100644
--- a/gtk/gtkcoloreditor.c
+++ b/gtk/gtkcoloreditor.c
@@ -409,7 +409,7 @@ pick_color (GtkButton      *button,
   g_free (token);
 
   g_dbus_proxy_call (editor->priv->portal_proxy,
-                     "ScreenshotPixel",
+                     "PickColor",
                      g_variant_new ("(sa{sv})", "", &options),
                      0,
                      -1,