@emergenitro Update snow z-index

[garyhtou]

Supersedes https://github.com/hackclub/hcb/pull/8968 due to git rewrite. Original PR by @emergenitro

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Summary of the problem

Just updated the snow to have a higher z-index as it is currently going behind the search bar in orgs. Here's an image before:

and after:

Thanks and let me know if there are any issues :)