obj: Fix doc comment and update example to build

examples/core-custom-entrypoint/App.zig

@@ -37,7 +37,7 @@ pub fn init(
 
     // Color target describes e.g. the pixel format of the window we are rendering to.
     const color_target = gpu.ColorTargetState{
-        .format = core.windows.get(core.main_window).?.framebuffer_format,
+        .format = core.windows.get(core.main_window, .framebuffer_format).?,
         .blend = &blend,
     };
 

src/module.zig

@@ -346,9 +346,9 @@ pub fn Objects(comptime T: type, options: ObjectsOptions) type {
             return false;
         }
 
-        /// Returns true if the field has an `updated` bit set in internal.
+        /// Sets an internal bit for the field indicating it has been updated.
         ///
-        /// Internal functions may set this bit back to false.
+        /// Internal functions may use this as a signal.
         pub fn setUpdated(objs: *@This(), id: ObjectID, field_name: anytype, value: bool) void {
             if (options.track_fields) {
                 const unpacked = objs.validateAndUnpack(id, "setUpdated");