🗣 Description

@schrolla noted that when viewing the readme on GitHub pages the ScubaGear logo is currently broken. This PR will removed the current absolute URL to accurately show up on GitHub pages.

💭 Motivation and context

change is required for the GitHub pages to show the ScubaGear logo.
closes issue #1575

🧪 Testing

created a fork with the changes added to main and published to a new GitHub pages site.
link to GitHub pages site: https://ahuynhmitre.github.io/ScubaGearlogoupdate/
screenshot linked below.

✅ Pre-approval checklist

• This PR has an informative and human-readable title.
• PR targets the correct parent branch (e.g., main or release-name) for merge.
• Changes are limited to a single goal - eschew scope creep!
• Changes are sized such that they do not touch excessive number of files.
• These code changes follow the ScubaGear content style guide.
• Related issues these changes resolve are linked preferably via closing keywords.
• All relevant type-of-change labels added.
• All relevant project fields are set.
• All relevant functional tests passed.
• All automated checks (e.g., linting, static analysis, unit/smoke tests) passed.

✅ Pre-merge checklist

• PR passed smoke test check.

• Feature branch has been rebased against changes from parent branch, as needed

  Use Rebase branch button below or use this reference to rebase from the command line.

• Resolved all merge conflicts on branch

• Notified merge coordinator that PR is ready for merge via comment mention

• Demonstrate changes to the team for questions and comments.
  (Note: Only required for issues of size Medium or larger)

✅ Post-merge checklist

• Feature branch deleted after merge to clean up repository.
• Verified that all checks pass on parent branch (e.g., main or release-name) after merge.