tiny grammatical edit (#73339)

README.rst

@@ -52,7 +52,7 @@ Get Involved
 *  Submit a proposed code update through a pull request to the ``devel`` branch.
 *  Talk to us before making larger changes
    to avoid duplicate efforts. This not only helps everyone
-   know what is going on, it also helps save time and effort if we decide
+   know what is going on, but it also helps save time and effort if we decide
    some changes are needed.
 *  For a list of email lists, IRC channels and Working Groups, see the
    `Communication page <https://docs.ansible.com/ansible/latest/community/communication.html>`_
@@ -63,7 +63,7 @@ Coding Guidelines
 We document our Coding Guidelines in the `Developer Guide <https://docs.ansible.com/ansible/devel/dev_guide/>`_. We particularly suggest you review:
 
 * `Contributing your module to Ansible <https://docs.ansible.com/ansible/devel/dev_guide/developing_modules_checklist.html>`_
-* `Conventions, tips and pitfalls <https://docs.ansible.com/ansible/devel/dev_guide/developing_modules_best_practices.html>`_
+* `Conventions, tips, and pitfalls <https://docs.ansible.com/ansible/devel/dev_guide/developing_modules_best_practices.html>`_
 
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