ci(pre-commit): finalise `rstcheck` configuration [skip ci]

* Automated using https://github.com/myii/ssf-formula/pull/267

.pre-commit-config.yaml

       - id: salt-lint
         name: Check Salt files using salt-lint
         files: ^.*\.(sls|jinja|j2|tmpl|tst)$
+  - repo: https://github.com/myint/rstcheck
+    rev: 3f929574
+    hooks:
+      - id: rstcheck
+        name: Check reST files using rstcheck
+        exclude: 'docs/CHANGELOG.rst'
+        args: [--report=warning]

docs/TOFS_pattern.rst

 
 Let's work with the NTP example. A basic formula that follows the `design guidelines <http://docs.saltstack.com/en/latest/topics/development/conventions/formulas.html>`_ has the following files and directories tree:
 
-.. code-block::
+.. code-block:: console
 
    /srv/saltstack/salt-formulas/ntp-saltstack-formula/
      ntp/
 
 If we decide that we want ``os_family`` as switch, then we could provide the formula template variants for both the ``RedHat`` and ``Debian`` families.
 
-.. code-block::
+.. code-block:: console
 
    /srv/saltstack/salt-formulas/ntp-saltstack-formula/ntp/files/
      default/
 
 If your formula is composed of several components, you may prefer to provides files under sub-directories, like in the `systemd-formula <https://github.com/saltstack-formulas/systemd-formula>`_.
 
-.. code-block::
+.. code-block:: console
 
    /srv/saltstack/systemd-formula/
      systemd/