docs(integration): Fix pre-commit config file

docs/integration.rst

@@ -9,6 +9,7 @@ Here is an example, to add in your .pre-commit-config.yaml
 
 .. code:: yaml
 
+  ---
   # Update the sha variable with the release version that you want, from the yamllint repo
   - repo: https://github.com/adrienverge/yamllint.git
     sha: v1.8.1