Bump fontawesome to remove console error

[kaixin-hc]

What is the purpose of this pull request?

• [ ] Documentation update
• [X] Bug fix
• [ ] Feature addition or enhancement
• [X] Code maintenance
• [ ] DevOps
• [ ] Improve developer experience
• [ ] Others, please explain:

Overview of changes: Bumping the version. This issue states it is resolved in 6.5. package-lock in a separate PR has to be bumped now to pass CI which uses npm CI

Anything you'd like to highlight/discuss: The changes in test files are expected - see this PR https://github.com/MarkBind/markbind/pull/2326 .

Testing instructions:

Before:

After:

Proposed commit message: (wrap lines at 72 characters) Bump fontawesome to remove console error(#2540)

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Checklist: :ballot_box_with_check:

• [ ] Updated the documentation for feature additions and enhancements
• [x] Added tests for bug fixes or features
• [x] Linked all related issues
• [x] No unrelated changes

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Reviewer checklist:

Indicate the SEMVER impact of the PR:

• [ ] Major (when you make incompatible API changes)
• [ ] Minor (when you add functionality in a backward compatible manner)
• [x] Patch (when you make backward compatible bug fixes)

At the end of the review, please label the PR with the appropriate label: r.Major, r.Minor, r.Patch.

Breaking change release note preparation (if applicable):

• To be included in the release note for any feature that is made obsolete/breaking

Give a brief explanation note about:

• what was the old feature that was made obsolete
• any replacement feature (if any), and
• how the author should modify his website to migrate from the old feature to the replacement feature (if possible).