Update docs/APDB.md

Co-authored-by: Andy Salnikov <[email protected]>

docs/APDB.md

@@ -38,7 +38,7 @@ Database Migrations
 
 The APDB database schema is upgraded using a special migration tool defined in the [dax_apdb_migrate](https://github.com/lsst-dm/dax_apdb_migrate) repository.
 For every version change to `apdb.yaml`, a new migration script needs to be added to that repository.
-The details of the migration process are described in the [package documentation](https://pipelines.lsst.io/modules/lsst.dax.apdb/index.html).
+The details of the migration process are described in the [package documentation](https://github.com/lsst-dm/dax_apdb_migrate/blob/main/doc/lsst.dax.apdb_migrate/index.rst).
 Migration scripts should normally be implemented on the same Jira ticket as the corresponding schema change.
 
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