Potential fix for pull request finding

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

Author: psiddh

extension/llm/apple/BUCK

@@ -22,8 +22,10 @@ non_fbcode_target(_kind = fb_apple_library,
     # on iOS-sim CPU regularly exceeds 30 minutes for a full forward pass.
     test_labels = ["glacial"],
     # Rule-level wall-clock for the whole auto-generated test bundle:
-    # 5 testcases x ~30min realistic + xctest setup. 4h provides ~1.5x
-    # headroom over the realistic worst case without being absurd.
+    # ExecuTorchLLMTests currently contains 13 XCTestCase methods, and
+    # individual methods can exceed 30 minutes on iOS-sim CPU. This 4h
+    # budget is intended as the total bundle/shard wall-clock, including
+    # xctest setup/teardown overhead; it is not based on "5 testcases".
     test_test_rule_timeout_ms = 14400000,
     test_deps = [
         ":ExecuTorchLLMTestResource",