chore(website): make casing consistent

Co-authored-by: Dylan Hyun <[email protected]>

Author: shleewhite

website/docs/components/code-block/partials/code/how-to-use.md

@@ -81,7 +81,7 @@ func main() {
 
 ### Copy button
 
-Set `hasCopyButton` to `true` to display a button for users to copy `CodeBlock` content to their computer clipboard. Use `copyButtonText` to provide a meaningful and unique label for the Copy Button.
+Set `hasCopyButton` to `true` to display a button for users to copy `CodeBlock` content to their computer clipboard. Use `copyButtonText` to provide a meaningful and unique label for the copy button.
 
 ```handlebars
 <Hds::CodeBlock

website/docs/components/code-editor/partials/code/how-to-use.md

@@ -71,7 +71,7 @@ The `language` argument sets the syntax highlighting used. We support the follow
 
 ### Copy button
 
-Set `hasCopyButton` to `true` to display a button for users to copy Code Editor content to their computer clipboard. Use `copyButtonText` to provide a meaningful and unique label for the Copy Button.
+Set `hasCopyButton` to `true` to display a button for users to copy Code Editor content to their computer clipboard. Use `copyButtonText` to provide a meaningful and unique label for the copy button.
 
 ```handlebars
 <Hds::CodeEditor