[pre-commit.ci] pre-commit autoupdate (#284)

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

Author: pre-commit-ci[bot]

.pre-commit-config.yaml

@@ -29,7 +29,7 @@ repos:
         args: [--profile=black]
 
   - repo: https://github.com/pre-commit/mirrors-prettier
-    rev: v2.6.2
+    rev: v2.7.1
     hooks:
       - id: prettier
         exclude: "jupyterlab_server/templates/.*.html"