Add TheHive connector (#54)

Author: lcawl

serverless/pages/action-connectors.mdx

@@ -139,6 +139,12 @@ The list of available connectors varies by project type.
         "href": "((kibana-ref))/swimlane-action-type.html",
         "target": "_blank"
       },
+      {
+        "title": "TheHive",
+        "description": "Create cases and alerts in TheHive.",
+        "href": "((kibana-ref))/thehive-action-type.html",
+        "target": "_blank"
+      },
       {
         "title": "Tines",
         "description": "Send events to a story.",