point api client docs to java sdk

Author: realark

README.md

@@ -19,6 +19,10 @@ The REST API documentation can be found on [www.braintrustdata.com](https://www.
 
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+## See Also
+
+This repo is a java client for the Braintrust REST api. If you wish to trace and write evals in java, see the [Braintrust Java SDK](https://github.com/braintrustdata/braintrust-sdk-java)
+
 ## Installation
 
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