fixup! escape hookshot variables using to_json

roles/matrix-bridge-hookshot/templates/config.yml.j2

@@ -90,7 +90,7 @@ passFile:
 bot:
   # (Optional) Define profile information for the bot user
   #
-  displayname: {{ matrix_hookshot_bot_displayname|to_json }}
+  displayname: {{ matrix_hookshot_bot_displayname }}
   avatar: {{ matrix_hookshot_bot_avatar }}
 metrics:
   # (Optional) Prometheus metrics support