Update Gratibot redemption items due to the launch of the Liatrio store

[zjorge96]

"Hiya! With the launch of the Liatrio store coming asap, I'd like to clean up the redemption options. Can we have everything removed with the exception of the following items:

• Custom Air Force Ones
• Custom Hawaiian Shirt
• Donation Options
• Visa Card Option

Is there a way we can add "Liatrio Store Item" with a fill in the blank option and the ability for me to deduct fistbumps? I'm trying to find the best way to have peeps redeem until we're able to integrate with the store." - @daniellejohnson01

[zjorge96]

https://github.com/liatrio/gratibot/actions/runs/6564369694

[densellp]

Liatrio store link added to rewards in gratibot, just needs to be published to prod