chore: group related package update together (#2833)

Author: kfiven

.github/renovate.json

@@ -15,6 +15,14 @@
     {
       "groupName": "Slatejs",
       "matchPackageNames": ["slate", "slate-dom", "slate-history", "slate-react"]
+    },
+    {
+      "groupName": "Call",
+      "matchPackageNames": ["@element-hq/element-call-embedded", "matrix-widget-api"]
+    },
+    {
+      "groupName": "Linkify",
+      "matchPackageNames": ["linkifyjs", "linkify-react"]
     }
   ],
   "lockFileMaintenance": {