chore(docs): Fix slices optimization links (#36768)

Author: imjoshin

docs/docs/how-to/cloud/slices-optimization.md

@@ -3,14 +3,14 @@ title: "Enable Slices API Optimizations"
 description: "Learn how to optimize your Slices on Gatsby Cloud"
 ---
 
-[Incremental Builds](/blog/2020-04-22-announcing-incremental-builds/) helps build your site faster. The [Slice API](/docs/reference/built-in-components/gatsby-slice) pushes your build speeds even further for common UI components. Learn how to use the Slice API in our [How-to doc](docs/docs/how-to/performance/using-slices).
+[Incremental Builds](/blog/2020-04-22-announcing-incremental-builds/) helps build your site faster. The [Slice API](/docs/reference/built-in-components/gatsby-slice) pushes your build speeds even further for common UI components. Learn how to use the Slice API in our [How-to doc](/docs/how-to/performance/using-slices).
 
 ## Cloud Optimizations
 
-By using Slices, Gatsby Cloud can optimize your builds even further by enabling the checkbox in your Build Features settings.
+When using Slices, Gatsby Cloud can optimize your builds even further. You can take advantage of these optimzations by enabling the checkbox in your Build Features settings.
 
 ![Slices API toggle in Gatsby Cloud](../../images/slices-api-optimization.png)
 
 By knowing which pieces of your site to build and host, Gatsby Cloud can increase build times on Slice changes by up to 90%.
 
-These optimizations for Slices requires [Unified Hosting](/docs/docs/how-to/cloud/unified-hosting).
+These optimizations for Slices requires [Unified Hosting](/docs/how-to/cloud/unified-hosting).