Update database icon to use phosphor

Problem/Motivation

The database icon in Navigation isn't the one from the Phosphor library so it doesn't match the others. We are using it in Canvas as of 📌 Add a link to the Pages view to the administration menu Active .

Steps to reproduce

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Proposed resolution

Update the SVG.

Remaining tasks

N/A

User interface changes

Updates the icon to match the others.

Before:

After:

Introduced terminology

N/A

API changes

N/A

Data model changes

N/A

Release notes snippet

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