Bump GNOME runtime to 47

[ryonakano]

No description provided.

[davidmhewitt]

GNOME version updates often have breaking API changes, so we would usually bump the platform version at the same time.

So this would be platform version 8.1.

Take a look through the previous commits to find how we did this previously

[ryonakano]

@davidmhewitt Thank you for your information, I've added a release note for 8.1.0.

[davidmhewitt]

This also needs changes to docker.yml and release.yml. See the following PR for an example:
https://github.com/elementary/flatpak-platform/pull/147/files

[ryonakano]

Thank you for pointing out, updated!

[davidmhewitt]

I think this PR should be ready to merge, is there a reason why it's still in draft state?

It may be worth looking if any of the platform components (icons, stylesheet, granite, etc...) need a version bump and release ready to be included in the next version of the platform.

But merging this won't release the new version yet anyway, it'll just start building on the daily branch so we can test porting applications to this runtime.

[ryonakano]

I think this PR should be ready to merge, is there a reason why it's still in draft state?

No, just I hesitated to do so because this is a breaking change 🙈 I'll mark this as ready.