Added lichess icon (#3535)

Co-authored-by: Lucas Becker <runxel@users.noreply.github.com>
Co-authored-by: Adam Rusted <hello@adamrusted.me>

_data/simple-icons.json

@@ -3860,6 +3860,11 @@
             "hex": "403C3D",
             "source": "https://github.com/libuv/libuv/blob/e4087dedf837f415056a45a838f639a3d9dc3ced/img/logos.svg"
         },
+        {
+            "title": "Lichess",
+            "hex": "000000",
+            "source": "https://lichess.org/about"
+        },
         {
             "title": "Lighthouse",
             "hex": "F44B21",

icons/lichess.svg

@@ -0,0 +1 @@
+<svg role="img" viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg"><title>Lichess icon</title><path d="M10.457 6.161a.237.237 0 0 0-.296.165c-.8 2.785 2.819 5.579 5.214 7.428.653.504 1.216.939 1.591 1.292 1.745 1.642 2.564 2.851 2.733 3.178a.24.24 0 0 0 .275.122c.047-.013 4.726-1.3 3.934-4.574a.257.257 0 0 0-.023-.06L18.204 3.407 18.93.295a.24.24 0 0 0-.262-.293c-1.7.201-3.115.435-4.5 1.425-4.844-.323-8.718.9-11.213 3.539C.334 7.737-.246 11.515.085 14.128c.763 5.655 5.191 8.631 9.081 9.532.993.229 1.974.34 2.923.34 3.344 0 6.297-1.381 7.946-3.85a.24.24 0 0 0-.372-.3c-3.411 3.527-9.002 4.134-13.296 1.444-4.485-2.81-6.202-8.41-3.91-12.749C4.741 4.221 8.801 2.362 13.888 3.31c.056.01.115 0 .165-.029l.335-.197c.926-.546 1.961-1.157 2.873-1.279l-.694 1.993a.243.243 0 0 0 .02.202l6.082 10.192c-.193 2.028-1.706 2.506-2.226 2.611-.287-.645-.814-1.364-2.306-2.803-.422-.407-1.21-.941-2.124-1.56-2.364-1.601-5.937-4.02-5.391-5.984a.239.239 0 0 0-.165-.295z"/></svg>