Matching rc number when parsing release version name from branch name
diff --git a/buildkite/bazelci.py b/buildkite/bazelci.py
index 37a4aa0..1d336a0 100755
--- a/buildkite/bazelci.py
+++ b/buildkite/bazelci.py
@@ -1326,7 +1326,7 @@
 
 
 def get_release_name_from_branch_name():
-    res = re.match(r"release-(\d+\.\d+\.\d+).*", os.getenv("BUILDKITE_BRANCH"))
+    res = re.match(r"release-(\d+\.\d+\.\d+(rc\d+)?).*", os.getenv("BUILDKITE_BRANCH"))
     return res.group(1) if res else ""