Update subprocessors.md

[spiros-spiros]

What's being changed:

I'm updating the list of subprocessors to add a few missing ones, and also format it like a table. I'm hoping it will look like this https://www.outreach.io/sub-processors

Type of change:

• [x ] Website updates (non-breaking change to update main page, company pages, pricing, etc)

How Has This Been Tested?

• [ ] GitHub action – automated build completed without errors
• [ x] Local build - the site works as expected when running yarn start

note, you can run yarn verify-links to test site links locally

[weaviate-git-bot]

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