added Kobold Press sites as shared credentials (#924)

* added Labyrinth as shared credential from KP Store

- added Kobold Press Labyrinth Archive of Worlds as shared credential from Kobold Press Webstore ([noted in login portal as a shared credential](https://labyrinth.talesofthevaliant.com/login/))

* switched to shared

- switched to shared since there is no from-to redirect

Author: mpanighetti

quirks/shared-credentials.json

@@ -388,6 +388,12 @@
         ],
         "fromDomainsAreObsoleted": true
     },
+    {
+        "shared": [
+            "koboldpress.com",
+            "labyrinth.talesofthevaliant.com"
+        ]
+    },
     {
         "from": [
             "letsdeel.com"