Remove undefined container className property

the `container` property is not  defined in the example  snippet and causes an error when the home page renders as the snippet was written.

I removed the className property to fix the issue.

Signed-off-by: Tate Hanawalt <tate@tatehanawalt.com>

docs/getting-started/homepage.md

@@ -157,7 +157,7 @@ export const HomePage = () => {
   return (
     <Grid container spacing={3}>
       <Grid item xs={12} md={4}>
-        <HomePageCompanyLogo className={container} />
+        <HomePageCompanyLogo />
       </Grid>
     </Grid>
   );