[photoview] Fix typo in immortal file

ansible/roles/photoview/templates/immortal.yml.j2

@@ -7,7 +7,7 @@ env:
     PHOTOVIEW_LISTEN_PORT: 4001
     PHOTOVIEW_API_ENDPOINT: "https://photos.unbl.ink/api/"
     PHOTOVIEW_UI_ENDPOINT: "https://photos.unbl.ink/"
-    MAPBOX_TOKEN: "{{mapbox_api_key}}""
+    MAPBOX_TOKEN: "{{mapbox_api_key}}"
     PHOTOVIEW_DEVELOPMENT_MODE: 0
 log:
     file: /var/log/photoview.log