update pre-commit config

Author: wenh06

.pre-commit-config.yaml

@@ -17,7 +17,7 @@ repos:
     rev: 7.3.0
     hooks:
       - id: flake8
-        args: [--max-line-length=128, '--exclude=./.*,build,dist,official*,torch_ecg,references,*.ipynb', '--ignore=E501,W503,E203,F841,E402,E231,E731', --count, --statistics, --show-source]
+        args: [--max-line-length=128, '--exclude=./.*,build,dist,official*,torch_ecg,references,*.ipynb', '--ignore=E501,W503,E203,F841,E402,E231,E731,E226', --count, --statistics, --show-source]
   - repo: https://github.com/pycqa/isort
     rev: 8.0.1
     hooks: