[Brand Updates] Fixes to some Woo icons

[hichamboushaba]

Description

This PR fixes two issues that were identified by the team today:

1. It updates the app logo with a new export from Figma, as the previous export had a tiny transparent line at the top, that was tinted with white or black depending on the device theme.
2. It updates the icon used in the Notification extension.

Steps to reproduce

1. Install the new update on a real device.
2. Confirm the logo doesn't have any white line at the top (move at the bottom dock for confirmation).
3. Test a push notification.
4. Long tap on the notification.
5. Confirm the notification custom UI uses the new icon.

Testing information

I tested just the app logo for my side, as I don't have a physical device on me.

iPhone 16 simulator, iOS 18.1

Screenshots

Before	After

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• I have considered if this change warrants user-facing release notes and have added them to RELEASE-NOTES.txt if necessary.

Reviewer (or Author, in the case of optional code reviews):

Please make sure these conditions are met before approving the PR, or request changes if the PR needs improvement:

• The PR is small and has a clear, single focus, or a valid explanation is provided in the description. If needed, please request to split it into smaller PRs.
• Ensure Adequate Unit Test Coverage: The changes are reasonably covered by unit tests or an explanation is provided in the PR description.
• Manual Testing: The author listed all the tests they ran, including smoke tests when needed (e.g., for refactorings). The reviewer confirmed that the PR works as expected on all devices (phone/tablet) and no regressions are added.

[dangermattic]

	1 Warning
⚠️	This PR is assigned to the milestone 21.6. This milestone is due in less than 2 days. Please make sure to get it merged by then or assign it to a milestone with a later deadline.

Generated by 🚫 Danger

[wpmobilebot]

📲 You can test the changes from this Pull Request in WooCommerce iOS by scanning the QR code below to install the corresponding build.

	App Name	WooCommerce iOS
	Build Number	pr15021-eaf1f25
	Version	21.5
	Bundle ID	com.automattic.alpha.woocommerce
	Commit	eaf1f25
	App Center Build	WooCommerce - Prototype Builds #12738

Automatticians: You can use our internal self-serve MC tool to give yourself access to App Center if needed.

[pmusolino]

I was able to test just the app icon. As for notifications, they aren't arriving unless in production, so I couldn't replicate that part. However, the image update seems correct, so I am approving the PR.