Update theme welcome messages to use Nebari

[pavithraes]

Fixes | Closes | Resolves #1390

Changes introduced in this PR:

• Updated messaging for Nebari

Types of changes

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• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds a feature)
• Breaking change (fix or feature that would cause existing features to not work as expected)
• Documentation Update
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no API changes)
• Build related changes
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Testing

Requires testing

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• No

[trallard]

LGTM - only note is if we intentionally dropped the {qhub_domain} well nebari on purpose?

[trallard]

Also do we need to change the target branch to release/2022.10.1?

[pavithraes]

Thanks for the review!

only note is if we intentionally dropped the {qhub_domain} well nebari on purpose?

I did drop that on purpose. I figured since users have already navigated to the domain, we don't provide new information by displaying it, but let me know if we want to add it back!

Also do we need to change the target branch to release/2022.10.1?

Oh, shall do!

[pavithraes]

Oops, I didn't even realize it. I'll open a new PR.