fix: adjust banner text

[iamacook]

What it solves

Updated banner text.

How this PR fixes it

The banner text now reads:

Safe's new official URL is app.safe.global, with a fully rebranded and refurbished application. The old app will run in parallel and we will announce its deprecation in time.

How to test it

Open the app and observe the new banner text.

Screenshots

[github-actions]

CLA Assistant Lite All Contributors have signed the CLA.

[github-actions]

ESLint Summary View Full Report

Annotations are provided inline on the Files Changed tab. You can also see all annotations that were generated on the annotations page.

Type	Occurrences	Fixable
Errors	0	0
Warnings	0	0
Ignored	0	N/A

• Result: ✅ success
• Annotations: 0 total

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^{Report generated by eslint-plus-action}

[coveralls]

Pull Request Test Coverage Report for Build 3427410539

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage increased (+0.003%) to 41.902%

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Files with Coverage Reduction	New Missed Lines	%
src/components/PsaBanner/index.tsx	1	0%

Totals
Change from base Build 3426813990:	0.003%
Covered Lines:	4777
Relevant Lines:	10406

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💛 - Coveralls