Add SimbaChain swag

[aslafy-z]

Wild swag opportunity appeared!

• I've checked that this isn't a duplicate issue.

Q. Which company offers it?
A. : SimbaChain

Q. Where have you seen the announcement (URL)?
A. : https://simbachain.com/community/join-our-community/

Q. What kind of swag (clothing, stickers, ...)?
A. : clothing (t-shirt)

Q. Have you received swag from this?
A. : No

Q. How long did it take?
A. : N/A

Q. Does it ship worldwide?
A. : Yes

Comes from this discussion: ethereum/go-ethereum#2104 (comment)

• I've checked that the promotion is legit.
• I've checked that it's still available to the public.

[berry120]

👍 This is an easy t-shirt steal if it works.