refactor: use de gruyter ci

frontend/static/degruyter-icons/Simple/Small-16px/SVG/Action/Attach-More-SM.svg

@@ -0,0 +1,7 @@
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+    <title>🧩 Icons/Simple/Action/16px/Attach-More-SM</title>
+    <g id="🧩-Icons/Simple/Action/16px/Attach-More-SM" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd">
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