$ flatpak update
Looking for updates…
Info: org.gnome.Platform//3.38 is end-of-life, with reason:
The GNOME 3.38 runtime is no longer supported as of August 19, 2021. Please ask your application developer to migrate to a supported platform.
Applications using this runtime:
uk.jnthn.backgammony
Nothing to do.
Hello !
See the following output: