replace the dead link to JNI bindings

Author: oconnor663

README.md

@@ -176,14 +176,13 @@ See [`c/README.md`](c/README.md).
 
 ### Other implementations
 
-We post links to third-party bindings and implementations on the
-[@BLAKE3team Twitter account](https://twitter.com/BLAKE3team) whenever
-we hear about them. Some highlights include [an optimized Go
+There are too many implementations out there for us to keep track of,
+but some highlights include [an optimized Go
 implementation](https://github.com/zeebo/blake3), [Wasm bindings for
 Node.js and browsers](https://github.com/connor4312/blake3), [binary
 wheels for Python](https://github.com/oconnor663/blake3-py), [.NET
-bindings](https://github.com/xoofx/Blake3.NET), and [JNI
-bindings](https://github.com/sken77/BLAKE3jni).
+bindings](https://github.com/xoofx/Blake3.NET), and [a pure Java
+implementation](https://commons.apache.org/proper/commons-codec/apidocs/org/apache/commons/codec/digest/Blake3.html).
 
 ## Contributing