Edit content field and remove type field from schedule.yml credits file

[seantokuzo]

Fixes #2875

What changes did you make and why did you make them ?

• In the file: website/_data/internal/credits/schedule.yml
• Changed the 'content' field to 'content-type'
• Removed the 'type' field
• Changes were made following instruction from issue - reduce redundancy with these fields

[github-actions]

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[Wny-Duong]

Availability: 2 hours
ETA: 7/14/22

[Wny-Duong]

Just need to tweak line 4. From the original issue, you're meant to change it to:

content-type: image

But your change made it:

content-type: icon

[seantokuzo]

Ah shoots I missed that. Should be updated now.

[Wny-Duong]

Thanks for making the change. Looks good!