Fix weird dictionary creation syntax
diff --git a/buildkite/bazelci.py b/buildkite/bazelci.py
index d911dd4..c082f2b 100755
--- a/buildkite/bazelci.py
+++ b/buildkite/bazelci.py
@@ -1674,12 +1674,13 @@
     step["timeout_in_minutes"] = 8 * 60
 
     # Automatically retry when an agent got lost (usually due to an infra flake).
-    step["retry"] = {}
-    step["retry"]["automatic"] = [
-        {"exit_status": -1, "limit": 3},   # Buildkite internal "agent lost" exit code
-        {"exit_status": 137, "limit": 3},  # SIGKILL
-        {"exit_status": 143, "limit": 3},  # SIGTERM
-    ]
+    step["retry"] = {
+        "automatic": [
+            {"exit_status": -1, "limit": 3},  # Buildkite internal "agent lost" exit code
+            {"exit_status": 137, "limit": 3},  # SIGKILL
+            {"exit_status": 143, "limit": 3},  # SIGTERM
+        ]
+    }
 
     return step