dev: bump version to v0.9.0rc2

Author: BillHuang2001

pyproject.toml

@@ -13,7 +13,7 @@ mypkg = ["*.txt", "*.json"]
 
 [project]
 name = "evox"
-version = "0.8.1"
+version = "0.9.0rc2"
 authors = [
   { name = "Bill Huang", email = "bill.huang2001@gmail.com" },
   { name = "Christina Lee", email = "1315552992@qq.com" },