Add image location to styleguide

[incarnate]

Description of the change: Add new location for images to styleguide
Reason for the change: A new directory has been added for images
Link to original source: Closes #4246

[SendGridDX]

All committers have signed the CLA.

[thinkingserious]

Hello @incarnate,

Thanks again for the PR!

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Team SendGrid DX

[thinkingserious]

Hello @incarnate,

Thanks again for the PR!

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[incarnate]

Hi @thinkingserious
Thanks for the update, I have another PR pending merging (sendgrid/sendgrid-oai#58) but that isn't tagged for Hacktoberfest since it was unprompted.

[thinkingserious]

Hello @incarnate,

Thanks again for the PR!

You have earned 1 out of the 5 points needed to receive glorious SendGrid Hacktoberfest swag.

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