another fix

Author: norareidy

source/api-documentation.txt

@@ -12,11 +12,11 @@ API Documentation
 - `BSON Record Codec <{+api-root+}/bson-record-codec/index.html>`__ - 
   classes for encoding and decoding between Java records and the BSON data 
   format.
-- `Core <{+api-root+}/mongodb-driver-core/index.html>`__ - classes that
+- `Core <{+api-root+}/driver-core/index.html>`__ - classes that
   contain essential driver functionality.
-- `Java Driver (modern API) <{+api-root+}/mongodb-driver-sync/index.html>`__ -
+- `Java Driver (modern API) <{+api-root+}/driver-sync/index.html>`__ -
   classes for the current driver API.
-- `Java Driver (legacy API) <{+api-root+}/mongodb-driver-legacy/index.html>`__ -
+- `Java Driver (legacy API) <{+api-root+}/driver-legacy/index.html>`__ -
   classes that support the legacy driver API. To learn how to upgrade from the
   legacy API to the modern API from the :ref:`<java-legacy-api>` documentation.