Fixed typos and grammar errors.

Added links to Local Server mention.
Fixed linting issues.

other-docs/guides/upgrading/v20.md

@@ -39,14 +39,14 @@ composer server cli -- altis migrate
 
 ## Changes to the Altis platform
 
-Altis dev tools now come with wp-browser 4.x and Codeception 5.x This upgrade has some breaking changes. Please refer to
+Altis dev tools now come with `wp-browser` 4.x and `Codeception` 5.x This upgrade has some breaking changes. Please refer to
 the [wp-browser release notes](https://github.com/lucatume/wp-browser/releases/tag/4.0.0)
-and [Codeception release post ](https://codeception.com/07-28-2022/codeception-5.html)
+and [Codeception release post](https://codeception.com/07-28-2022/codeception-5.html)
 
 ## PHP
 
 We have added experimental support for PHP 8.3. This is not yet recommended for production use but you can test your code with
-PHP 8.3 in local server
+PHP 8.3 in [Local Server](docs://local-server/).
 
 Refer to our [PHP Version Guide](docs://guides/updating-php/) for up-to-date compatibility, testing and upgrading information.
 
@@ -60,9 +60,9 @@ we welcome feedback.
 
 ### WordPress 6.6.1
 
-WordPress 6.6 brings lots of new features, bug fixes, and improvements across the board. In particular, there are improvemnets
+WordPress 6.6 brings lots of new features, bug fixes, and improvements across the board. In particular, there are improvements
 in performance and accessibility, and new features and updates for the block editor (Gutenberg) and the block API.
-There have been theming improvements of interest to theme developers and designers
+There have been theming improvements of interest to theme developers and designers.
 For developers, the Options API has been improved again, allowing more flexibility in fine-tuning your application performance.
 WordPress 6.6 also drops support for PHP7.0 and 7.1 but given Altis doesn't support PHP 7 at all, this will not affect your
 Altis sites. A number of new filter and action hooks have been added and improvements to modernise the code and apply coding
@@ -73,15 +73,15 @@ See the
 
 ### Altis Core improvements
 
-Altis dev tools now come with wp-browser 4 and Codeception 5. This brings full support for PHP 8+. As well as improvements to
+Altis dev tools now come with `wp-browser` 4 and `Codeception` 5. This brings full support for PHP 8+. As well as improvements to
 both tools. See the [wp-browser release notes](https://github.com/lucatume/wp-browser/releases/tag/4.0.0)
-and [Codeception release post ](https://codeception.com/07-28-2022/codeception-5.html)
+and [Codeception release post](https://codeception.com/07-28-2022/codeception-5.html)
 
 Local server now supports TablePlus as well as Sequel Ace.
 
 We have incorporated many updates to modules and libraries in Altis to bring in important bug fixes and improvements.
 
 ### Documentation
 
-Our developer focussed documentation has been improved again. As usual, feedback from our customers and partners is always welcome.
+Our developer focused documentation has been improved again. As usual, feedback from our customers and partners is always welcome.
 Please [send us any feedback you have](mailto:[email protected]).