chore: Update invite & discussion links

[Jiralite]

Please describe the changes this PR makes and why it should be merged:

• Flexes vanity URL
• Corrects a link so it redirects to this repository's discussions
• A random extra point so it seems like I'm doing stuff

Status and versioning classification:

• This PR only includes non-code changes, like changes to documentation, README, etc.

[codecov[bot]]

Codecov Report

Merging #187 (5f617a2) into main (a75393a) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #187   +/-   ##
=======================================
  Coverage   73.84%   73.84%           
=======================================
  Files          21       21           
  Lines         906      906           
  Branches      221      221           
=======================================
  Hits          669      669           
  Misses        235      235           
  Partials        2        2           

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