Backport PR matplotlib#31647: FIX: Pin rstcheck to prevent CI failure (matplotlib#31650)

Co-authored-by: Ruth Comer <10599679+rcomer@users.noreply.github.com>

Author: rcomer

.pre-commit-config.yaml

@@ -70,6 +70,7 @@ repos:
     hooks:
       - id: rstcheck
         additional_dependencies:
+          - rstcheck-core!=1.3  # https://github.com/rstcheck/rstcheck-core/pull/114#pullrequestreview-4239740896
           - sphinx>=1.8.1
           - tomli
   - repo: https://github.com/adrienverge/yamllint