[Update term] `Function as a Service` for `En`

[pasimoes]

1. Please describe why this term needs to be updated

Why this term needs to be updated? (briefly)

• My suggestion to be more instructive for the reader is to add a description of public cloud providers and also frameworks (famous) which allow building FaaS.

Some examples of Managed Public Cloud FaaS include:

• AWS Lambda
• Microsoft Azure Functions.
• Google Cloud Functions
• Oracle Cloud Infrastructure Functions

Some examples of Platforms for executing FaaS in Public and Private Cloud:

• OpenFaaS
• Apache OpenWhisk
• Knative

2. Checklist

• [X] I understand that maintainers will confirm if the term should be updated. (Please be patient)
• [X] I want to work on this suggestion. (If not checked, maintainers will assign another volunteer)

(Note)

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[Aarav238]

I would like to work on it. Could you please assign this to me

[CathPag]

@pasimoes, unfortunately, we don't want to point to any proprietary products. The Glossary should focus on open source only. I'll go ahead and closes this PR. If there was more to your proposal than adding the examples, please let me know.