chore: updating filter icon

[georgewrmarshall]

Description

This pull request updates the filter icon's stroke thickness to align with the Figma design and other icons in the MetaMask design system. The current filter icon's stroke is thinner than intended, causing inconsistency with the overall visual hierarchy of the design system. Adjusting the stroke ensures better alignment and uniformity across the UI elements.

Related issues

Fixes: #12333

Manual testing steps

1. Navigate to a screen in the MetaMask extension where the filter icon is displayed.
2. Verify the updated filter icon's stroke thickness matches the Figma design specifications.
3. Compare the filter icon with other icons in the design system to confirm visual consistency.

Screenshots/Recordings

Pre-merge author checklist

• I’ve followed MetaMask Contributor Docs and MetaMask Mobile Coding Standards.
• I've completed the PR template to the best of my ability.
• I’ve included tests if applicable.
• I’ve documented my code using JSDoc format if applicable.
• I’ve applied the right labels on the PR (see labeling guidelines). Not required for external contributors.

Pre-merge reviewer checklist

• I've manually tested the PR (e.g., pull and build branch, run the app, test code being changed).
• I confirm that this PR addresses all acceptance criteria described in the ticket it closes and includes the necessary testing evidence such as recordings and or screenshots.

[github-actions]

CLA Signature Action: All authors have signed the CLA. You may need to manually re-run the blocking PR check if it doesn't pass in a few minutes.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud