Raise priority for external connectors in initdb

By default, OpenLibrary and Inventaire were prioritzed below other
BookWyrm nodes. In practice, people have gotten better search results
from these connectors, hence the change. With the search refactor, this
has much less impact, but it will show these search results higher in
the list.

If the results page shows all the connectors' results integrated, this
field should be removed entirely.

bookwyrm/management/commands/initdb.py

@@ -89,7 +89,7 @@ def init_connectors():
         covers_url="https://inventaire.io",
         search_url="https://inventaire.io/api/search?types=works&types=works&search=",
         isbn_search_url="https://inventaire.io/api/entities?action=by-uris&uris=isbn%3A",
-        priority=3,
+        priority=1,
     )
 
     models.Connector.objects.create(
@@ -101,7 +101,7 @@ def init_connectors():
         covers_url="https://covers.openlibrary.org",
         search_url="https://openlibrary.org/search?q=",
         isbn_search_url="https://openlibrary.org/api/books?jscmd=data&format=json&bibkeys=ISBN:",
-        priority=3,
+        priority=1,
     )