Added line break (#1942)

* Added line break

To add more space and to make it more spaced out.

* Create neat-rice-study.md

Co-authored-by: Jon Rohan <yes@jonrohan.codes>
Co-authored-by: Jon Rohan <rohan@github.com>

Author: reeceatkinson

.changeset/neat-rice-study.md

@@ -0,0 +1,5 @@
+---
+"@primer/css": patch
+---
+
+Added line break to docs

docs/content/index.mdx

@@ -92,6 +92,7 @@ Primer CSS is published to npm as `@primer/css`. Each of Primer CSS's "modules"
   <Text as="p" m={0}>
     Pick and choose what you need. Install the entire Primer CSS bundle or import individual folders.
   </Text>
+  <br/>
   <ButtonOutline as={Link} to="/getting-started" mt={4} style={{textDecoration: 'none'}}>
     Installation instructions
   </ButtonOutline>