doc: Changed version in changelog to match version bump to 3.0.0.
# Aparapi Changelog
-## v2.0.1
+## v3.0.0
* Add support for getKernelMaxWorkGroupSize(), getKernelCompileWorkGroupSize(), getKernelPreferredWorkGroupSizeMultiple(), getKernelMinimumPrivateMemSizeInUsePerWorkItem() and getKernelLocalMemSizeInUse()
* Fixed Barriers give inconsistent results on NVIDIA backend.
* New Kernel.compile(...) methods for forcing pre-compilation of a kernel without executing it
