ci skip: Update README.md

Author: flowerinthenight

README.md

@@ -81,3 +81,7 @@ $ ./simple -db projects/{v}/instances/{v}/databases/{v} -table mytable -name myl
 ```
 
 The leader process should output something like `leader active (me)`. You can then try to stop (Ctrl+C) that process and observe another one taking over as leader.
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+## License
+
+This library is licensed under the [Apache 2.0 License](./LICENSE).