fix: typo in time sandboxed utilities (#1205)

Author: sachiniyer

temporalio/worker/workflow_sandbox/_restrictions.py

@@ -785,7 +785,8 @@ def _public_callables(parent: Any, *, exclude: Set[str] = set()) -> Set[str]:
                 "monotonic",
                 "monotonic_ns",
                 "perf_counter",
-                "perf_counter_ns" "process_time",
+                "perf_counter_ns",
+                "process_time",
                 "process_time_ns",
                 "sleep",
                 "time",