fix(homepage): update src/pages/index.astro init step copy — remove 'connect Slack or Discord' (post-netclaw-dev/netclaw#1368)

[Aaronontheweb]

Context

One-line copy fix in src/pages/index.astro after netclaw-dev/netclaw#1368 ships.

Current

The homepage "Get Started" section has an init step note that says something like "connect Slack or Discord" — implying channels are configured during netclaw init. Channels are no longer part of the init wizard.

Should become

Update the init step note to reflect the new 5-step wizard scope:

"Pick your LLM provider, set your identity and security posture."

(Drop the "connect Slack or Discord" claim. Channels are now set up in netclaw config.)

Exact wording should match the new quickstart.md framing from sub-issue #57.

Screenshots or tapes needed

None — copy-only change.

Acceptance criteria

• Homepage init step note no longer claims channels are set up during netclaw init
• New copy accurately reflects 5-step scope (provider, identity, security posture)

Dependencies

• Can start now — no binary required
• May be folded into the same PR as sub-issue docs(getting-started): rewrite quickstart.md for 5-step init flow (post-netclaw-dev/netclaw#1368) #57 (quickstart.md rewrite) or sub-issue docs(getting-started): update installation.md next-step callout (post-netclaw-dev/netclaw#1368) #58 (installation.md)

Part of #55