Properly rename INSTANCE_ID and VERTEX_ID in canvas item shaders in the compatibility backend

drivers/gles3/storage/material_storage.cpp

@@ -1157,8 +1157,8 @@ MaterialStorage::MaterialStorage() {
 		actions.renames["SCREEN_PIXEL_SIZE"] = "screen_pixel_size";
 		actions.renames["FRAGCOORD"] = "gl_FragCoord";
 		actions.renames["POINT_COORD"] = "gl_PointCoord";
-		actions.renames["INSTANCE_ID"] = "gl_InstanceIndex";
-		actions.renames["VERTEX_ID"] = "gl_VertexIndex";
+		actions.renames["INSTANCE_ID"] = "gl_InstanceID";
+		actions.renames["VERTEX_ID"] = "gl_VertexID";
 
 		actions.renames["LIGHT_POSITION"] = "light_position";
 		actions.renames["LIGHT_DIRECTION"] = "light_direction";