update rc2

setup.py

@@ -559,10 +559,10 @@ def get_version_add(sha: Optional[str] = None) -> str:
             if sha is None:
                 sha = get_sha(vllm_root)
             if (major, minor) >= ('2', '5'):
-                version = 'das.opt1.rc1.' + sha[:7]
+                version = 'das.opt1.rc2.' + sha[:7]
     else:
         if (major, minor) >= ('2', '5'):
-            version = 'das.opt1.rc1'
+            version = 'das.opt1.rc2'
 
 
     # dtk version
@@ -819,4 +819,4 @@ setup(
     },
     cmdclass=cmdclass,
     package_data=package_data,
-)
+)
\ No newline at end of file