Add RST spellcheck (#524)

* Add docs spelling check
* Add codespell config to noxfile and ci
* Update README with details on spelling checks

Co-authored-by: Maxwell G <9920591+gotmax23@users.noreply.github.com>

README.md

@@ -8,6 +8,27 @@ This repository holds the ReStructuredText (RST) source, and other files, for us
 
 Follow the documentation to [set up your environment](https://docs.ansible.com/ansible/latest/community/documentation_contributions.html#setting-up-your-environment-to-build-documentation-locally) and then [build Ansible community documentation locally](https://docs.ansible.com/ansible/latest/community/documentation_contributions.html#building-the-documentation-locally)
 
+## Using nox
+
+This project includes a `nox` configuration to automate checks and other functions.
+You should use `nox` to run checks locally before you submit a pull request.
+
+Install `nox` using `python3 -m pip install nox` or your distribution's package manager.
+
+Run `nox --list` from the repository root to view available sessions.
+
+Run `nox` with no arguments to execute the default sessions.
+
+## Running the spelling check
+
+This repository uses [`codespell`](https://github.com/codespell-project/codespell) to check for common spelling mistakes in the documentation source.
+
+Run `nox -s spelling` to check spelling.
+
+Run `nox -s spelling -- -w` to correct spelling errors.
+
+When `codespell` suggests more than one word as a correction, run `nox -s spelling -- -w -i 3` to select an option.
+
 ## Updating the dependencies
 
 To update dependencies, you can use `nox -e pip-compile`. Since this requires Python 3.10, this might not work in your environment if you do not have Python 3.10 installed. In that case, you can use root-less podman with a Python 3.10 image: