[gnome-calculator] snap: fix typo in gnome-3-26-1604 plug

[Jeremy Bicha <jbicha src gnome org>]

commit 955404d46d823d512a26ab368cbdfd771739acb9
Author: Jeremy Bicha <jbicha ubuntu com>
Date:   Thu Jan 31 11:29:47 2019 -0500

    snap: fix typo in gnome-3-26-1604 plug

 snap/snapcraft.yaml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/snap/snapcraft.yaml b/snap/snapcraft.yaml
index a714318d..77513995 100644
--- a/snap/snapcraft.yaml
+++ b/snap/snapcraft.yaml
@@ -27,7 +27,7 @@ plugs:
   gnome-3-26-1604:
     interface: content
     target: $SNAP/gnome-platform
-    default-provider: gnome-3-26-1804
+    default-provider: gnome-3-26-1604
   gtk-3-themes:
     interface: content
     target: $SNAP/data-dir/themes