Update git.io shortlinks

[danielcompton]

Effective Friday, April 29, 2022 all links on git.io will stop redirecting.

https://github.blog/changelog/2022-04-25-git-io-deprecation

checking from my phone I think this is most of the links:

• https://git.io/JOs8J -> https://github.com/clojars/clojars-web/wiki/Groups#creating-a-group
• https://git.io/v1IAs -> https://github.com/clojars/clojars-web/wiki/About#why-cant-i-redeploy-a-non-snapshot-version
• https://git.io/vMUHN -> https://github.com/clojars/clojars-web/wiki/About#why-cant-i-deploy-something-that-uses-a-group--artifact-name-that-exists-on-maven-central
• https://git.io/v1IA2 - https://github.com/clojars/clojars-web/wiki/About#what-is-the-legal-format-for-a-version
• https://git.io/v1IAl -> https://github.com/clojars/clojars-web/wiki/About#what-is-the-legal-format-for-a-group-or-project-name
• https://git.io/JfwjM -> https://github.com/clojars/clojars-web/wiki/Deploy-Tokens