Fixed link

Author: dfreniche

docs/20-prerequisites.mdx

@@ -18,7 +18,7 @@ connection URI and credentials.
 ### Option 2: Load the schema and data into your own PostgreSQL server
 
 If you already have a PostgreSQL server set up, you can import the schema and data used in this lab. Download the file 
-[1-library-schema-and-data.sql](https://github.com/mongodb-developer/relational-migrator-lab/docker/sample-postgres-library/init/1-library-schema-and-data.sql)
+[1-library-schema-and-data.sql](https://github.com/mongodb-developer/relational-migrator-lab/blob/main/docker/sample-postgres-library/init/1-library-schema-and-data.sql)
 file and load it using psql or [pgAdmin](https://www.pgadmin.org/download/).
 
 ### Option 3: Run a PostgreSQL container using Docker