docs: update getting-started.mdx (#95)

Author: mleralec

website/src/pages/docs/getting-started.mdx

@@ -66,8 +66,8 @@ const Button = styled.button`
   border: 2px solid;
   border-color: ${props => props.theme.colors.primary};
   color: ${props => props.theme.colors.primary};
-  margin: 0 ${props => theme.space[3]};
-  padding: ${props => theme.space[1]} ${props => theme.space[3]};
+  margin: 0 ${props => props.theme.space[3]};
+  padding: ${props => props.theme.space[1]} ${props => props.theme.space[3]};
 `
 ```