fixed names for the overlay template part

Author: MaggieCabrera

overlay-test/parts/header.html

@@ -16,7 +16,7 @@
 		</div>
 		<!-- /wp:group -->
 
-		<!-- wp:navigation {"overlay":"overlay-test//overlay-pattern", "layout":{"type":"flex","setCascadingProperties":true,"justifyContent":"right","orientation":"horizontal"},"style":{"spacing":{"margin":{"top":"0"}}}} /-->
+		<!-- wp:navigation {"overlay":"overlay-test//overlay", "layout":{"type":"flex","setCascadingProperties":true,"justifyContent":"right","orientation":"horizontal"},"style":{"spacing":{"margin":{"top":"0"}}}} /-->
 
 	</div>
 	<!-- /wp:group -->

overlay-test/theme.json

@@ -39,7 +39,7 @@
 		},
 		{
 			"area": "overlay",
-			"name": "overlay-pattern"
+			"name": "overlay"
 		}
 	]
 }