linting fix

Author: liustve

aws-opentelemetry-distro/src/amazon/opentelemetry/distro/otlp_aws_span_exporter.py

@@ -90,7 +90,7 @@ def _export(self, serialized_data: bytes):
                     signer.add_auth(request)
                     self._session.headers.update(dict(request.headers))
 
-                except Exception as signing_error: # pylint: disable=broad-except
+                except Exception as signing_error:  # pylint: disable=broad-except
                     _logger.error("Failed to sign request: %s", signing_error)
 
             else: