credits: record co-authors the squash merges dropped

The recent batch of squash merges lost their Co-authored-by trailers.
This commit restores the credit. Per merged PR:

- #381: @zlx, @leixf-lab
- #382: @lamenting-hawthorn
- #383: @lamenting-hawthorn
- #385: @lamenting-hawthorn
- #386: @lamenting-hawthorn
- #387: @ianTPE
- #402: @lamenting-hawthorn
- #454: @paucommit
- #470: @lamenting-hawthorn
- #476: @lamenting-hawthorn, @Dhevenddra, @Saidheerajgollu, @mariohercules, @foxytanuki
- #481: @Luke20w, @KateZhang98, @AdamSEY, @rsindall
- #482: @lucassz
- #494: @salluexez, @SomSamantray, @gregario, @yoldaolmak, @lamenting-hawthorn
- #512: @wooheum-xin, @Jackallink, @ianTPE, @lmo-selected, @xieqian0816, @hugo2046
- #515: @mariohercules, @Luke20w, @tchudleigh1, @Restry

Co-authored-by: adamsey <adam.lababidi@gmx.com>
Co-authored-by: Dhevenddra <dhevg20020402@gmail.com>
Co-authored-by: foxytanuki <biz@foxytanuki.dev>
Co-authored-by: Greg Jackson <gregj64@gmail.com>
Co-authored-by: hugo <shen.lan123@gmail.com>
Co-authored-by: Ian Chou <33033541+ianTPE@users.noreply.github.com>
Co-authored-by: Jackallink <61698219+Jackallink@users.noreply.github.com>
Co-authored-by: KateZhang98 <kate@tinyfish.io>
Co-authored-by: Hawthorn <rv.help23@gmail.com>
Co-authored-by: leixf-lab <289300866+leixf-lab@users.noreply.github.com>
Co-authored-by: lmo-selected <lmo-selected@users.noreply.github.com>
Co-authored-by: lucassz <4793515+lucassz@users.noreply.github.com>
Co-authored-by: Luke20w <weidnerluke@gmail.com>
Co-authored-by: Mario <643672+mariohercules@users.noreply.github.com>
Co-authored-by: Pau Garcia <193717438+paucommit@users.noreply.github.com>
Co-authored-by: Restry <restry@users.noreply.github.com>
Co-authored-by: rsindall <rsindall@users.noreply.github.com>
Co-authored-by: Sai Dheeraj Gollu <saidheeraj.gollu@sjsu.edu>
Co-authored-by: Mohd Salauddin <sallumalik1111@gmail.com>
Co-authored-by: Som Samantray <92726151+SomSamantray@users.noreply.github.com>
Co-authored-by: Tom <tchudleigh1@gmail.com>
Co-authored-by: Wooheum Xin <xin98@naver.com>
Co-authored-by: xieqian0816 <260077733+xieqian0816@users.noreply.github.com>
Co-authored-by: yoldaolmak <159899613+yoldaolmak@users.noreply.github.com>
Co-authored-by: Newell Zhu <zlx.star@gmail.com>