[pre-commit.ci] pre-commit autoupdate

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

Author: pre-commit-ci[bot]

.pre-commit-config.yaml

@@ -20,6 +20,6 @@ repos:
     - id: end-of-file-fixer
     - id: trailing-whitespace
   - repo: https://github.com/kynan/nbstripout
-    rev: 0.8.0
+    rev: 0.8.1
     hooks:
       - id: nbstripout