Bump version to 1.5.1 (#769)

Signed-off-by: Jiachen Zhang <zjc462490@alibaba-inc.com>

Author: zhangjaycee

pyproject.toml

@@ -7,7 +7,7 @@ build-backend = "setuptools.build_meta"
 authors = [{ name = "chatos@alibaba" }]
 requires-python = "<4.0,>=3.10"
 name = "rl-rock"
-version = "1.5.0"
+version = "1.5.1"
 description = "ROCK-Reinforcement Open Construction Kit"
 readme = "README.md"
 dependencies = [