fix: remove f from err msg string

solves lint fail

core/testcontainers/core/waiting_utils.py

@@ -119,5 +119,5 @@ def wait_for_logs(
         if duration > timeout:
             raise TimeoutError(f"Container did not emit logs satisfying predicate in {timeout:.3f} " "seconds")
         if raise_on_exit and container.get_wrapped_container().status != 'running':
-            raise RuntimeError(f"Container exited before emitting logs satisfying predicate")
+            raise RuntimeError("Container exited before emitting logs satisfying predicate")
         time.sleep(interval)