This upgrade guide covers upgrading from Duende IdentityServer v7.1 to v7.2 (release notes).
Duende IdentityServer 7.2 adds:
There are no changes to the data stores in this release.
In your IdentityServer host project, update the version of the NuGet. For example in your project file:
<PackageReference Include="Duende.IdentityServer" Version="7.1.0" />
would change to:
<PackageReference Include="Duende.IdentityServer" Version="7.2.0" />
That’s it. Of course, at this point you can and should test that your IdentityServer is updated and working properly.