Set new nextcloud/gitea database volumes

This changed because of a migration from postgresql 12 -> 13. Future
versions should probably be named with the database version appended,
rather than "new", but for now this is how the system is set up.

etc/nixos/services/gitea.nix

@@ -41,7 +41,7 @@
         POSTGRES_PASSWORD = "/qNDDK9WCMuubfA7D8DFwfl9T+Gy2IMDvPhiNpcxZjY=";
       };
       volumes = [
-        "gitea-db-data:/var/lib/postgresql/data"
+        "gitea-db-data-new:/var/lib/postgresql/data"
       ];
       networks = [
         "gitea"

etc/nixos/services/nextcloud.nix

@@ -66,7 +66,7 @@
         POSTGRES_PASSWORD = "rI7t7Nek1yGA9ucrRc7Uhy0jcjwPjnXa8me4o8tJON8=";
       };
       volumes = [
-        "nextcloud-db-data:/var/lib/postgresql/data"
+        "nextcloud-db-data-new:/var/lib/postgresql/data"
       ];
       networks = [
         "nextcloud"