updated img tag in CONTRIBUTING.md

[Chrisklangley]

Fixes #5620

What changes did you make?

• on line 990 I removed the space and the forward slash of the img tag

Why did you make the changes (we will use this info to test)?

• consistency for self closing tags

FOR REVIEWERS: https://github.com/chrisklangley/website/blob/img-tag-refactor-5620/CONTRIBUTING.md

Screenshots of Proposed Changes Of The Website (if any, please do not screen shot code changes)

No visual changes

[github-actions]

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From your project repository, check out a new branch and test the changes.

git checkout -b Chrisklangley-img-tag-refactor-5620 gh-pages
git pull https://github.com/Chrisklangley/website.git img-tag-refactor-5620

[jaasonw]

looks good no more space and no more package-lock.json 🚀

[ajb176]

• Changes made as requested in linked issue
• Follows naming convention and merges into correct branch
• No unwanted visual changes

Nice work!

As a side note, you can remove the unused bullet points by removing the dashes. You don't have to keep them just because they're in the template.