chore(lint): fix codespell complaints

Signed-off-by: Dariusz Duda <dariusz.duda@canonical.com>

tests/unit/services/test_config.py

@@ -217,7 +217,7 @@ def test_default_config_handler_success(default_config_handler, item, expected):
 )
 def test_config_service_converts_type(
     monkeypatch: pytest.MonkeyPatch,
-    fake_services,  # Has to be intantiated before `fake_process` as it calls lsb_release
+    fake_services,  # Has to be instantiated before `fake_process` as it calls lsb_release
     fake_process: pytest_subprocess.FakeProcess,
     item: str,
     environment_variables: dict[str, str],