[gnome-builder] help: update extensions image

[Christian Hergert <chergert src gnome org>]

commit 784a5701988fc7495c71153a0fc126ee70262788
Author: Christian Hergert <chergert redhat com>
Date:   Tue Mar 12 13:16:20 2019 -0700

    help: update extensions image

 doc/help/figures/extensions.png | Bin 232476 -> 355457 bytes
 doc/help/plugins/enabling.rst   |   2 +-
 2 files changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/doc/help/figures/extensions.png b/doc/help/figures/extensions.png
index 09073b596..d0c9e47bc 100644
Binary files a/doc/help/figures/extensions.png and b/doc/help/figures/extensions.png differ
diff --git a/doc/help/plugins/enabling.rst b/doc/help/plugins/enabling.rst
index 11b67183e..752f1c068 100644
--- a/doc/help/plugins/enabling.rst
+++ b/doc/help/plugins/enabling.rst
@@ -25,5 +25,5 @@ Then use the switches on the right to enable or disable an extension.
 .. tip:: Use the search entry in the upper left to search for an extension
 
 .. image:: ../figures/extensions.png
-   :width: 1280 px
+   :width: 1101 px
    :align: center