Granite version should be >=5.3.0

[shimataro]

Fixes #346
Granite v5.2 does not have AccelLabel, and v5.3 has it!

[Alecaddd]

This can't be done unless the base SDK is also updated in the build system.
You can do that if you want, but I'm waiting for elementary OS 7 to release with the new GTK4 SDK in order to update everything.

[ryonakano]

Makes sense to me. I personally feel we may want to merge this change for now, before we go ahead to port the app to GTK 4.

The Flatpak CI is failing due to another issue that the libaio package not found in the Debian server.