fix: add guard for 3.10

Author: alexanderankin

core/testcontainers/core/container.py

@@ -220,7 +220,8 @@ def start(self) -> Self:
             try:
                 self._wait_strategy.wait_until_ready(self)
             except TimeoutError as ex:
-                ex.add_note(self._container.logs().decode())
+                if hasattr(ex, "add_note"):
+                    ex.add_note(self._container.logs().decode())
                 raise ex
 
         logger.info("Container started: %s", self._container.short_id)