Fix markdown title problem with Fake version number helper

Author: Arkatufus

RELEASE_NOTES.md

@@ -1,7 +1,7 @@
 ### 0.10.0 April 13 2021 ####
 * [Add a generic cross platform serialization support](https://github.com/akkadotnet/Hyperion/pull/208)
 
-## Cross platform serialization
+# Cross platform serialization
 
 You can now address any cross platform package serialization differences by providing a list of package name transformation lambda function into the `SerializerOptions` constructor. The package name will be passed into the lambda function before it is deserialized, and the result of the string transformation is used for deserialization instead of the original package name.