🔧(project) Add trailing slash to yprovider api path

The value in the production environment .env example was missing a
trailing slash in the path. This commit adjusts this to be in the same
format as in other places.

env.d/production.dist/yprovider

@@ -1,4 +1,4 @@
-Y_PROVIDER_API_BASE_URL=http://${YPROVIDER_HOST}:4444/api
+Y_PROVIDER_API_BASE_URL=http://${YPROVIDER_HOST}:4444/api/
 Y_PROVIDER_API_KEY=<generate a random key>
 COLLABORATION_SERVER_SECRET=<generate a random key>
 COLLABORATION_SERVER_ORIGIN=https://${DOCS_HOST}