docs, es: Adding note about office hours, removing note about developer meetings

What is the problem I am trying to address?

Translating the term "office hours" to spanish.

How is the fix applied?

Adding the translation to docs/content/_index.es.md

Mention the issue number it fixes or add the details of the changes if it doesn't have a specific issue.

N/A

Blocked by https://github.com/gomods/athens/pull/1344

Let's merge this after #1344 since that has some changes to the English page that aren't yet in here

Sorry I've been AFK for the last couple of weeks. Does this still apply? I mean, do you need any help from me still? Just let me know!

No problem @lopezator! I just merged #1344, so can you make changes according to https://github.com/gomods/athens/commit/8f836fac3527508fb4db1fe7b5194bdd89be0089, if you haven't already?

There are also some conflicts in here since I've merged #1344. Let me know if you want any help solving them

Also, no pressure if you get busy. When you're ready, we'll be here 😄