[pre-commit.ci] pre-commit autoupdate (#6135)

updates:
- [github.com/ambv/black: 21.5b1 → 21.5b2](https://github.com/ambv/black/compare/21.5b1...21.5b2)

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

.pre-commit-config.yaml

@@ -6,7 +6,7 @@ repos:
       - id: black
         language_version: python3
     repo: https://github.com/ambv/black
-    rev: 21.5b1
+    rev: 21.5b2
   - hooks:
       - id: isort
         language_version: python3