Update apple connection icon

[jdaniel-okta]

Changes

• Update apple connection icon

References

Testing

• This change adds unit test coverage
• This change adds integration test coverage
• This change has been tested on the latest version of the platform/language

Checklist

• I have read the Auth0 general contribution guidelines
• I have read the Auth0 Code of Conduct
• All code quality tools/guidelines have been run/followed
• All relevant assets have been compiled

[cschetan77]

@jdaniel-okta In this pr as well, can you please address the comment - #2851 (comment)

Also,
there are a few other pending changes on v13 that need to be verified before we cut a release. Please remove the following from this PR:

• CHANGELOG.md entry for v13.3.0
• README.md CDN link update
• .version, package.json, and package-lock.json version bumps

This PR should only contain the css/social_icons.styl fix. I'll cut the release separately once everything is ready.

Rename the branch - After removing the release artifacts, please rename the branch away from release/v13.3.0 (e.g. fix/apple-connection-icon-v13). The release pipeline triggers automatically on branches prefixed with release/, so leaving it as-is could cause an unintended publish.