Update README.md (fix year)

[milos-korenciak]

Hi, fix copyright + year ;-)

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}

[codecov[bot]]

Codecov Report

Patch and project coverage have no change.

Comparison is base (07a9619) 100.00% compared to head (9a6f1ab) 100.00%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #5 +/- ## ========================================= Coverage 100.00% 100.00% ========================================= Files 2 2 Lines 65 65 ========================================= Hits 65 65 ``` | [Flag](https://app.codecov.io/gh/bitcart/universalasync/pull/5/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=bitcart) | Coverage Δ | | |---|---|---| | [tests](https://app.codecov.io/gh/bitcart/universalasync/pull/5/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=bitcart) | `100.00% <ø> (ø)` | | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=bitcart#carryforward-flags-in-the-pull-request-comment) to find out more.

:umbrella: View full report in Codecov by Sentry.

:loudspeaker: Have feedback on the report? Share it here.

[MrNaif2018]

Hi, by copyright laws we either leave the year of creation or specify full range 2021-2024 now, I prefer to leave year of creation usually