Add cloud platforms to updating guide

[dichotommy]

Discussed in https://github.com/meilisearch/documentation/discussions/1267

^{Originally posted by dichotommy March 6, 2021} Current version of the Updating guide covers the process of migrating a database from an older version of MeiliSearch to a newer one. This is a process that should no longer be necessary come v1 (minor versions will no longer be breaking).

Since the Updating Guide has limited usefulness (let's estimate 12 months of continued usefulness), is it worth expanding it with specific instructions for updating MeiliSearch on cloud platforms?

For example:

• Docker
• DigitalOcean
• AWS
• any other cloud options that require specific processes or commands

[guimachiavelli]

Even though v1 should significantly stabilise things, breaking versions will still be a (rare) reality. In my opinion, this guide will always be at least a bit useful, so, yes, I think reviewing it is a good use of our resources.

[maryamsulemani97]

fixed in #2058