fix: Be more explicit about page-title being a helper rather than a component

[ynotdraw]

With embroider, you need to be more explicit on differentiating components versus helpers. By wrapping this in ( and ), we are explicitly telling it that this is a helper rather than a component. Even though embroider may not be adopted everywhere yet, I think getting folks in the habit of doing this now may make their migration path a lot easier.

[NullVoxPopuli]

thank you!!!

[bertdeblock]

See https://discord.com/channels/480462759797063690/485447409296736276/1015243372505608253.

[kategengler]

The parens aren't necessary with embroider. @NullVoxPopuli Do you think this is relevant?

[NullVoxPopuli]

It's needed whet staticComponents: true isn't set in ember-cli-build.js, because there is no way to statically differentiate {{page-title}} from component or helper.

I don't agree that it should be a part of the blueprint though, because (imo!!), the blueprint should be static-all-the-things-first, rather than partially migrated static-all-the-things