[gnome-sdk-images] Upgrade to WebKitGTK+ 2.22.2

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 1521770380e0020deb6f842cad1f651dcc40cf92
Author: Michael Catanzaro <mcatanzaro igalia com>
Date:   Fri Sep 21 15:58:21 2018 -0500

    Upgrade to WebKitGTK+ 2.22.2

 org.gnome.Sdk.json.in | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/org.gnome.Sdk.json.in b/org.gnome.Sdk.json.in
index da10f36..b917a02 100644
--- a/org.gnome.Sdk.json.in
+++ b/org.gnome.Sdk.json.in
@@ -873,8 +873,8 @@
             "sources": [
                 {
                     "type": "archive",
-                    "url": "https://webkitgtk.org/releases/webkitgtk-2.22.0.tar.xz";,
-                    "sha256": "fa42b54a98831405c8a3e7f40371eec3f0bd5cdbb124813a5e329e7a9f8c6f2a"
+                    "url": "https://webkitgtk.org/releases/webkitgtk-2.22.2.tar.xz";,
+                    "sha256": "345487d4d1896e711683f951d1e09387d3b90d7cf59295c0e634af7f515e99ba"
                 }
             ]
         },