Fix update track metadata

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 9 lines in your changes missing coverage. Please review.

Project coverage is 54.69%. Comparing base (77e5bc5) to head (f819224).

Files with missing lines	Patch %	Lines
webrtc/lib/webrtc_endpoint.ex	0.00%	9 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #408 +/- ## ========================================== - Coverage 54.87% 54.69% -0.18% ========================================== Files 75 75 Lines 3357 3366 +9 ========================================== - Hits 1842 1841 -1 - Misses 1515 1525 +10 ``` | [Files with missing lines](https://app.codecov.io/gh/fishjam-dev/membrane_rtc_engine/pull/408?dropdown=coverage&src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=fishjam-dev) | Coverage Δ | | |---|---|---| | [webrtc/lib/webrtc\_endpoint.ex](https://app.codecov.io/gh/fishjam-dev/membrane_rtc_engine/pull/408?src=pr&el=tree&filepath=webrtc%2Flib%2Fwebrtc_endpoint.ex&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=fishjam-dev#diff-d2VicnRjL2xpYi93ZWJydGNfZW5kcG9pbnQuZXg=) | `0.00% <0.00%> (ø)` | | ... and [1 file with indirect coverage changes](https://app.codecov.io/gh/fishjam-dev/membrane_rtc_engine/pull/408/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=fishjam-dev) ------ [Continue to review full report in Codecov by Sentry](https://app.codecov.io/gh/fishjam-dev/membrane_rtc_engine/pull/408?dropdown=coverage&src=pr&el=continue&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=fishjam-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=fishjam-dev) > `Δ = absolute (impact)`, `ø = not affected`, `? = missing data` > Powered by [Codecov](https://app.codecov.io/gh/fishjam-dev/membrane_rtc_engine/pull/408?dropdown=coverage&src=pr&el=footer&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=fishjam-dev). Last update [77e5bc5...f819224](https://app.codecov.io/gh/fishjam-dev/membrane_rtc_engine/pull/408?dropdown=coverage&src=pr&el=lastupdated&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=fishjam-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=fishjam-dev).