[pre-commit.ci] pre-commit autoupdate

updates:
- [github.com/kynan/nbstripout: 0.6.2 → 0.7.1](kynan/nbstripout@0.6.2...0.7.1)

Author: pre-commit-ci[bot]

.pre-commit-config.yaml

@@ -97,7 +97,7 @@ repos:
     -   id: nbqa-mypy
         args: [--ignore-missing-imports]
 -   repo: https://github.com/kynan/nbstripout
-    rev: 0.6.2
+    rev: 0.7.1
     hooks:
     -   id: nbstripout
         exclude: (docs)