fix bazel version specifier for BCR
diff --git a/.bcr/presubmit.yml b/.bcr/presubmit.yml
index 34519c1..aad4915 100644
--- a/.bcr/presubmit.yml
+++ b/.bcr/presubmit.yml
@@ -4,6 +4,6 @@
   verify_build_targets:
     name: "Verify build targets"
     platform: ${{ platform }}
-    bazel_version: 6.4.0rc5
+    bazel: 6.4.0rc5
     build_targets:
       - "@rules_java//java/..."