refactor: use de gruyter ci

frontend/static/degruyter-icons/Simple/Small-16px/SVG/Action/Video-Audio/Video-Audio-Back-15-SM.svg

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg width="16px" height="16px" viewBox="0 0 16 16" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+    <title>🧩 Icons/Simple/Action/16px/Video-Audio/Video-Audio-Back-15-SM</title>
+    <g id="🧩-Icons/Simple/Action/16px/Video-Audio/Video-Audio-Back-15-SM" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd">
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