[CI] Upgrade the version of isort to fix lint error in master branch (#2520)

## Motivation

https://github.com/open-mmlab/mmeval/pull/85

---------

Co-authored-by: Miao Zheng <76149310+MeowZheng@users.noreply.github.com>
Co-authored-by: Zaida Zhou <58739961+zhouzaida@users.noreply.github.com>

.pre-commit-config.yaml

@@ -3,8 +3,8 @@ repos:
     rev: 5.0.4
     hooks:
       - id: flake8
-  - repo: https://github.com/PyCQA/isort
-    rev: 5.10.1
+  - repo: https://github.com/zhouzaida/isort
+    rev: 5.12.1
     hooks:
       - id: isort
   - repo: https://github.com/pre-commit/mirrors-yapf