Update header logo svg file and sizes in CSS

[Mao8a]

https://pethealthinc.atlassian.net/browse/PM-573

Test URLs:

• Before: https://main--24petwatch--hlxsites.hlx.page/
• After: https://feature-pm-573-logo-replacement--24petwatch--hlxsites.hlx.page/

[aem-code-sync]

Hello, I'm the AEM Code Sync Bot and I will run some actions to deploy your branch and validate page speed.
In case there are problems, just click a checkbox below to rerun the respective action.

• Re-run PSI checks
• Re-sync branch

Commits

• 229e0f1 ✅ (latest)
• 629bdb4 ✅

[aem-code-sync]

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