Update setup.py

Author: medb

setup.py

@@ -20,7 +20,7 @@
 
 setup(
     name="dataproc-spark-connect",
-    version="1.0.0rc3",
+    version="1.0.0rc4",
     description="Dataproc client library for Spark Connect",
     long_description=long_description,
     author="Google LLC",