Update master to main in docs (#1685)

CONTRIBUTING.md

@@ -87,7 +87,7 @@ This is generally not necessary, but in case you need to manually publish a vers
 
 You can run `npm publish --dry-run` to see everything that _would_ happen during publish, without actually publishing to the npm registry.
 
-Note the branch is `v-next` for now. When we we merge this branch to `master`, these instructions should be updated.
+Note the branch is `v-next` for now. When we we merge this branch to `main`, these instructions should be updated.
 
 ## Overriding source code previews in Storybook
 

README.md

@@ -6,7 +6,7 @@
 
 🚨 **You are currently viewing the `v-next` branch.** This represents a significant refactor of our environment and coding standards. It is a work in progress and not yet ready for use.
 
-If you’re looking for the most stable version of our pattern library, check out [the `master` branch](https://github.com/cloudfour/cloudfour.com-patterns/tree/master).
+If you’re looking for the most stable version of our pattern library, check out [the `main` branch](https://github.com/cloudfour/cloudfour.com-patterns/tree/main).
 
 [View Netlify Preview →](https://v-next--cloudfour-patterns.netlify.com/)
 

src/components/ground-nav/demo/pwa-stats.twig

@@ -6,7 +6,7 @@
   {% endblock %}
   {% block legal %}
     <p class="c-ground-nav__legal">
-      Designed by Cloud Four (<a href="https://github.com/cloudfour/pwastats/blob/master/LICENSE">License</a>)
+      Designed by Cloud Four (<a href="https://github.com/cloudfour/pwastats/blob/main/LICENSE">License</a>)
     </p>
   {% endblock %}
 {% endembed %}