fix navigation submenu background (#6890)

bibimbap/parts/header.html

@@ -8,6 +8,6 @@
 <!-- /wp:group --></div>
 <!-- /wp:group -->
 
-<!-- wp:navigation {"overlayBackgroundColor":"secondary","layout":{"type":"flex","setCascadingProperties":true,"justifyContent":"right","orientation":"horizontal"},"style":{"spacing":{"margin":{"top":"0"}}}} /--></div>
+<!-- wp:navigation {"overlayBackgroundColor":"secondary","overlayTextColor":"background","textColor":"foreground","layout":{"type":"flex","setCascadingProperties":true,"justifyContent":"right","orientation":"horizontal"},"style":{"spacing":{"margin":{"top":"0"}}}} /--></div>
 <!-- /wp:group --></div>
 <!-- /wp:group -->

bibimbap/patterns/hero-header.php

@@ -17,7 +17,7 @@
 <!-- /wp:group --></div>
 <!-- /wp:group -->
 
-<!-- wp:navigation {"textColor":"background","layout":{"type":"flex","setCascadingProperties":true,"justifyContent":"right","orientation":"horizontal"},"style":{"spacing":{"margin":{"top":"0"}}}} /--></div>
+<!-- wp:navigation {"overlayBackgroundColor":"secondary","overlayTextColor":"background","textColor":"background","layout":{"type":"flex","setCascadingProperties":true,"justifyContent":"right","orientation":"horizontal"},"style":{"spacing":{"margin":{"top":"0"}}}} /--></div>
 <!-- /wp:group -->
 
 <!-- wp:spacer {"height":"600px"} -->