Env Vars RFC is out of date

[echlebek]

Component(s)

docs/rfcs

What happened?

Describe the bug
The env vars rfc is out of date. (https://github.com/open-telemetry/opentelemetry-collector/blob/main/docs/rfcs/env-vars.md#current-behavior)

In https://github.com/open-telemetry/opentelemetry-collector/blob/main/CHANGELOG.md#v1110v01040, the syntax for environment variables was changed, but the documentation was seemingly not updated to reflect that. I did look for an issue regarding it but didn't find one.

Collector version

This applies to every version after and including v0.104.0

Environment information

No response

OpenTelemetry Collector configuration

Log output

Additional context

No response

[github-actions]

Pinging code owners:

• docs/rfcs: @codeboten @bogdandrutu @dmitryax @mx-psi

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[mx-psi]

@echlebek The section that should reflect the current state is the "Desired behavior" section. The $FOO syntax was indeed deprecated (since accidental uses of it such as in passwords/keys caused issues for some users)