refactor: use de gruyter ci

frontend/static/degruyter-icons/Simple/Medium-24px/SVG/Action/Phone-MD.svg

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg width="24px" height="24px" viewBox="0 0 24 24" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+    <title>🧩 Icons/Simple/Action/24px/Phone-MD</title>
+    <g id="🧩-Icons/Simple/Action/24px/Phone-MD" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd">
+        <path d="M10.0098298,2.00031974 C10.0919643,4.08691013 10.6855759,6.04207876 11.6687676,7.7439286 L9.83356113,8.93146089 C10.9312413,10.8540167 12.4714904,12.4912537 14.3155476,13.7044111 L14.6883687,13.941347 L15.9534742,12.1506765 C17.7246977,13.2416949 19.7886895,13.9032486 22.0003068,13.9901948 L22,22 C11.0693643,22 2.18677495,13.2312714 2.00290706,2.34448942 L2,2 L10.0098298,2.00031974 Z M4.11,3.999 L4.14118664,4.26649209 C5.16202815,12.397748 11.6042112,18.8296016 19.7183219,19.8566566 L20,19.889 L20,15.783 L19.739043,15.7370716 C18.7380347,15.5439597 17.7648641,15.2463268 16.8330549,14.8503493 L16.575,14.736 L15.2229374,16.6507927 L13.2163387,15.3752611 C11.2385445,14.0741216 9.57009471,12.3484446 8.33740586,10.3305466 L8.09671569,9.92310999 L7.15866649,8.28014327 L9.093,7.028 L8.99232886,6.78129906 C8.67487271,5.96990224 8.43096508,5.12950241 8.26441043,4.26867065 L8.216,4 L4.11,3.999 Z" id="Primary" fill="#000000"></path>
+    </g>
+</svg>