Replaced old Twitter handle and link with new

Author: jeff-matthews

.github/CONTRIBUTING.md

@@ -148,6 +148,6 @@ You can provide feedback using the following options:
 Have a question? Need help? Magento DevDocs, Maintainers, and other Contributors are available through:
 
 -  [Slack](https://magentocommeng.slack.com/archives/CAN932A3H) ([Join us](https://opensource.magento.com/slack))
--  [Twitter @MagentoDevDocs](https://twitter.com/MagentoDevDocs)
+-  [Twitter @AdobeCommrcDocs](https://twitter.com/AdobeCommrcDocs)
 
 Thank you for contributing your brilliance to Magento DevDocs!!

README.md

@@ -169,4 +169,4 @@ If you have questions, open an issue and ask us. We're looking forward to hearin
 
 -  [Slack](https://magentocommeng.slack.com/archives/CAN932A3H) ([Join us](https://opensource.magento.com/slack))
 -  [Visit our wiki](https://github.com/magento/devdocs/wiki)
--  <a href="https://twitter.com/MagentoDevDocs" class="twitter-follow-button" data-show-count="false">Twitter @MagentoDevDocs</a>
+-  <a href="https://twitter.com/AdobeCommrcDocs" class="twitter-follow-button" data-show-count="false">Twitter @AdobeCommrcDocs</a>

src/community/best-practices.md

@@ -42,4 +42,4 @@ You can [contribute](https://github.com/magento/devdocs/blob/master/.github/CONT
 
 Some PRs may require architectural and internal development reviews to verify and approve the contributed best practices. These reviews may require more time to complete before merging content.
 
-If you have any questions, contact us through [#DevDocs Slack](https://magentocommeng.slack.com/archives/CAN932A3H) (or [join us](https://t.co/9HImUyCmyh)) or Twitter [@MagentoDevDocs](https://twitter.com/MagentoDevDocs).
+If you have any questions, contact us through [#DevDocs Slack](https://magentocommeng.slack.com/archives/CAN932A3H) (or [join us](https://t.co/9HImUyCmyh)) or Twitter [@AdobeCommrcDocs](https://twitter.com/AdobeCommrcDocs).