Logo section accessibility doc

[bethcollins92]

Done

• Removed redundant "logo" from each alt attribute in logo section example

Fixes #4052

QA

• Open demo
• Check the formatting of the accessibility doc, the content has already been reviewed in the doc

Check if PR is ready for release

If this PR contains Vanilla SCSS code changes, it should contain the following changes to make sure it's ready for the release:

• PR should have one of the following labels to automatically categorise it in release notes:
  • Feature 🎁, Breaking Change 💣, Bug 🐛, Documentation 📝, Maintenance 🔨.
• Vanilla version in package.json should be updated relative to the most recent release, following semver convention:
  • if CSS class names are not changed it can be bugfix relesase (x.x.X)
  • if CSS class names are changed/added/removed it should be minor version (x.X.0)
  • see the wiki for more details
• Any changes to component class names (new patterns, variants, removed or added features) should be listed on the what's new page.
• Documentation side navigation should be updated with the relevant labels

[webteam-app]

Demo starting at https://vanilla-framework-4262.demos.haus

[bethcollins92]

@sowasred2012 If you get a sec would you mind taking a look at this PR please? The text has already been reviewed by dev and ux so it's just a final skim before I can merge

[sowasred2012]

LGTM, just a couple of suggestions