Help/About: Update the About page for 7.0

[mukeshpanchal27]

Trac ticket: https://core.trac.wordpress.org/ticket/64536

Text copy - https://docs.google.com/document/d/1LLziX7fdw9iftLOtbpkZ2TN8FfOS3sDVX4nIuJCwBV4/edit?tab=t.ok56kf4oaexa#heading=h.66j85f6jwwxu

The Image assets is missing in this PR.

Use of AI Tools

N/A

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This Pull Request is for code review only. Please keep all other discussion in the Trac ticket. Do not merge this Pull Request. See GitHub Pull Requests for Code Review in the Core Handbook for more details.

[github-actions]

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[audrasjb]

I left a comment concerning one translation string