Roll version back to 3.30.1rc1 for testpypi build

pyproject.toml

diff --git a/pyproject.toml b/pyproject.toml
index 0af1e77..9b010ea 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -5,7 +5,7 @@
 [project]
 name = "cassandra-driver"
 description = "Apache Cassandra Python Driver"
-version = "3.30.1"
+version = "3.30.1rc1"
 dependencies = ['geomet>=1.1', "Deprecated>=1.3.1"]
 readme = "README.rst"
 authors = [{name = "DataStax"}]