[pre-commit.ci] pre-commit autoupdate (#987)

updates:
- [github.com/kynan/nbstripout: 0.8.0 → 0.8.1](kynan/nbstripout@0.8.0...0.8.1)

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

.pre-commit-config.yaml

@@ -27,6 +27,6 @@ repos:
                 ]
 
     - repo: https://github.com/kynan/nbstripout
-      rev: 0.8.0
+      rev: 0.8.1
       hooks:
           - id: nbstripout