Recording endpoint README fixes

[codecov[bot]]

Codecov Report

Merging #365 (bd5227c) into master (36d1c4f) will increase coverage by 0.03%. The diff coverage is n/a.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #365 +/- ## ========================================== + Coverage 52.80% 52.84% +0.03% ========================================== Files 58 58 Lines 2534 2534 ========================================== + Hits 1338 1339 +1 + Misses 1196 1195 -1 ``` | [Files](https://app.codecov.io/gh/jellyfish-dev/membrane_rtc_engine/pull/365?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=jellyfish-dev) | Coverage Δ | | |---|---|---| | [engine/lib/membrane\_rtc\_engine/engine.ex](https://app.codecov.io/gh/jellyfish-dev/membrane_rtc_engine/pull/365?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=jellyfish-dev#diff-ZW5naW5lL2xpYi9tZW1icmFuZV9ydGNfZW5naW5lL2VuZ2luZS5leA==) | `83.49% <ø> (ø)` | | ... and [1 file with indirect coverage changes](https://app.codecov.io/gh/jellyfish-dev/membrane_rtc_engine/pull/365/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=jellyfish-dev) ------ [Continue to review full report in Codecov by Sentry](https://app.codecov.io/gh/jellyfish-dev/membrane_rtc_engine/pull/365?src=pr&el=continue&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=jellyfish-dev). > **Legend** - [Click here to learn more](https://docs.codecov.io/docs/codecov-delta?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=jellyfish-dev) > `Δ = absolute (impact)`, `ø = not affected`, `? = missing data` > Powered by [Codecov](https://app.codecov.io/gh/jellyfish-dev/membrane_rtc_engine/pull/365?src=pr&el=footer&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=jellyfish-dev). Last update [36d1c4f...bd5227c](https://app.codecov.io/gh/jellyfish-dev/membrane_rtc_engine/pull/365?src=pr&el=lastupdated&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=jellyfish-dev). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=jellyfish-dev).

[sgfn]

Changes included in #366