Update RELEASE_NOTES.md

Author: komamitsu

RELEASE_NOTES.md

@@ -1,14 +1,14 @@
 # Release Notes
 
 ## 0.8.13
- * Fix ambiguous overload in Java 9[#415](https://github.com/msgpack/msgpack-java/pull/415)
- * Make MessagePackParser accept a string as a byte array field[#420](https://github.com/msgpack/msgpack-java/pull/420)
- * Support MessagePackGenerator#writeNumber(String)[#422](https://github.com/msgpack/msgpack-java/pull/422)
+ * Fix ambiguous overload in Java 9 [#415](https://github.com/msgpack/msgpack-java/pull/415)
+ * Make MessagePackParser accept a string as a byte array field [#420](https://github.com/msgpack/msgpack-java/pull/420)
+ * Support MessagePackGenerator#writeNumber(String) [#422](https://github.com/msgpack/msgpack-java/pull/422)
 
 ## 0.8.12
- * Fix warnings in build.sbt[#402](https://github.com/msgpack/msgpack-java/pull/402)
- * Add ExtensionTypeCustomDeserializers and MessagePackFactory#setExtTypeCustomDesers[#408](https://github.com/msgpack/msgpack-java/pull/408)
- * Avoid a CharsetEncoder bug of Android 4.x at MessagePacker#packString[#409](https://github.com/msgpack/msgpack-java/pull/409)
+ * Fix warnings in build.sbt [#402](https://github.com/msgpack/msgpack-java/pull/402)
+ * Add ExtensionTypeCustomDeserializers and MessagePackFactory#setExtTypeCustomDesers [#408](https://github.com/msgpack/msgpack-java/pull/408)
+ * Avoid a CharsetEncoder bug of Android 4.x at MessagePacker#packString [#409](https://github.com/msgpack/msgpack-java/pull/409)
 
 ## 0.8.11
  * Fixed NPE when write(add)Payload are used at the beginning [#392](https://github.com/msgpack/msgpack-java/pull/392)