[pre-commit.ci] pre-commit autoupdate

Author: pre-commit-ci[bot]

.pre-commit-config.yaml

@@ -30,7 +30,7 @@ repos:
   - id: blacken-docs
     additional_dependencies: [black==20.8b1]
 - repo: https://github.com/pre-commit/pygrep-hooks
-  rev: v1.7.1
+  rev: v1.8.0
   hooks:
   - id: rst-backticks
 - repo: https://github.com/tox-dev/tox-ini-fmt