Minor documentation fixes

- advertise ansible-dev-tools as an installation alternative
- fixed some broken or redirected URLs
- fixed some typos

Related: [AAP-19818](https://issues.redhat.com/browse/AAP-19818)

README.md

@@ -11,9 +11,9 @@ It does the following:
 
 Note: The API (library) part of this package is not officially supported and
 might change as time goes on. CLI commands should be considered stable within
-major verions (the `X` of version `X.Y.Z`).
+major versions (the `X` of version `X.Y.Z`).
 
-Documentation can be found on [ansible-sign.readthedocs.io](https://ansible-sign.readthedocs.io/en/latest/)
+Documentation can be found on [ansible-sign.readthedocs.io](https://ansible.readthedocs.io/projects/sign/en/latest/)
 including a
-[rundown/tutorial](https://ansible.github.io/ansible-sign/rundown.html)
+[rundown/tutorial](https://ansible.readthedocs.io/projects/sign/en/latest/rundown.html)
 explaining how to use the CLI for basic project signing and verification.

docs/conf.py

@@ -164,7 +164,7 @@
 html_theme_options = {
     "display_version": False,
     "titles_only": False,
-    "documentation_home_url": "https://ansible.github.io/ansible-sign/",
+    "documentation_home_url": "https://ansible.readthedocs.io/projects/sign/en/latest/",
 }
 
 # Add any paths that contain custom themes here, relative to this directory.

docs/rundown.rst

@@ -70,6 +70,17 @@ Run the following command to install ``ansible-sign``:
 
    $ pip install ansible-sign
 
+.. note::
+
+   An **alternative** approach to install ``ansible-sign`` is using the ``ansible-dev-tools`` package.
+   `Ansible Development Tools (ADT) <https://ansible.readthedocs.io/projects/dev-tools/>`_ is a single Python package that includes all necessary tools to
+   set up a development environment, generate new collections, build and test the content consistently, resulting in robust automation.
+
+   .. code-block:: shell
+
+      # This also installs ansible-core if it is not already installed
+      $ pip3 install ansible-dev-tools
+
 Once it’s installed, run:
 
 .. code-block:: shell

tox.ini

@@ -1,6 +1,6 @@
 [tox]
 minversion = 3.24
-envlist = py3,lint
+envlist = py3,lint,docs
 isolated_build = True