docs: update list of contributors

PR-URL: #1940

Signed-off-by: stdlib-bot <82920195+stdlib-bot@users.noreply.github.com>
Reviewed-by: Planeshifter <1913638+Planeshifter@users.noreply.github.com>

Author: stdlib-bot

CONTRIBUTORS

@@ -27,6 +27,7 @@ Jaimin Godhani <112328542+Jai0401@users.noreply.github.com>
 James Gelok <jdgelok@gmail.com>
 Jaysukh Makvana <jaysukhmakvana2004@gmail.com>
 Jithin KS <jithinks112@gmail.com>
+Joel Mathew Koshy <joelmathewkoshy@gmail.com>
 Joey Reed <joeyrreed@gmail.com>
 Jordan Gallivan <115050475+Jordan-Gallivan@users.noreply.github.com>
 Joris Labie <joris.labie1@gmail.com>