Update ETH issuance page for post-Merge

[samajammin]

Is your feature request related to a problem? Please describe.

Someone raised some questions on the ETH issuance page: https://ethresear.ch/t/some-questions-on-new-burning-and-issuance-mechanism/13695

Describe the solution you'd like

Review & address questions in the page content.

Describe alternatives you've considered

None... 😄

Additional context

This page content will already be audited as part of #7075, so can perhaps be solved there.

[veridelisi]

Anybody explain?

[veridelisi]

anaybody?

[samajammin]

Hey @veridelisi - looks like this is being addressed in #7921

[samajammin]

I tried to explain the issue description but let me know if you have any specific questions.