Adding test instructions and links to CONTRIBUTING.md #7762

[aswutmaxcy]

Fixes #7762

What changes did you make?

• Added test instruction and links to section 2.7 and 2.7b

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

• For Reviewers: Do not review changes locally, rather, review changes at (https://github.com/aswutmaxcy/website/blob/add-test-contribute-7762/CONTRIBUTING.md)
• to add a section to explain testing and the importance of it

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Screenshots of Proposed Changes To The Website (if any, please do not include screenshots of code changes)

• No visual changes to the website

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Note that CONTRIBUTING.md cannot previewed locally; rather it should be previewed at this URL:

https://github.com/aswutmaxcy/website/blob/add-test-contribute-7762/CONTRIBUTING.md  

[kdaca19xx]

Availability: after 1pm (pacific) ETA: 6/25

[xnealcarson]

Availablity: After 5pm PST ETA: 6/25 end of day

[aswutmaxcy]

@kdaca19xx Thank you so much for going through this with a fine tooth comb and finding the mistakes, I totally blanked on these! I just made all the changes you suggested and @t-will-gillis I also implemented the changes you suggested as well. Thank you both for taking the time to find these mistakes.

[aswutmaxcy]

@t-will-gillis whoops! I'm a dumb, I just pushed the changes, it's up now

[kdaca19xx]

Availability: after 1pm (pacific) ETA: 6/25

New ETA: 6/26 (Thx for your changes and patience @aswutmaxcy !)

[aswutmaxcy]

@t-will-gillis thank you for the catch! I just pushed the changes

[aswutmaxcy]

@t-will-gillis If I messed it up again this time, I give you permission to burn my computer

[t-will-gillis]

PR has two previous reviews and Approvals, OK to merge.