Add sphinx-lint as a pre-commit hook (#627)

Author: AlexWaygood

.pre-commit-config.yaml

@@ -17,6 +17,10 @@ repos:
       - id: forbid-submodules
       - id: mixed-line-ending
         args: [--fix=lf]
+  - repo: https://github.com/sphinx-contrib/sphinx-lint
+    rev: v1.0.0
+    hooks:
+      - id: sphinx-lint
   - repo: https://github.com/python-jsonschema/check-jsonschema
     rev: 0.33.0
     hooks: