add roundcube icon (#1821)

* add roundcube icon

* remove roundcube fill attribute

* capitalize brand name

_data/simple-icons.json

@@ -1170,7 +1170,7 @@
             "title": "GIMP",
             "hex": "5C5543",
             "source": "https://www.gimp.org/about/linking.html#wilber-the-gimp-mascot"
-        },        
+        },
         {
             "title": "Git",
             "hex": "F05032",
@@ -2761,6 +2761,11 @@
             "hex": "525DDC",
             "source": "https://roots.io/"
         },
+        {
+            "title": "Roundcube",
+            "hex": "37BEFF",
+            "source": "https://roundcube.net/images/roundcube_logo_icon.svg"
+        },
         {
             "title": "RSS",
             "hex": "FFA500",

icons/roundcube.svg

@@ -0,0 +1 @@
+<svg role="img" viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg"><title>Roundcube icon</title><path d="M19.9 8.6c0 1.2-.3 2.3-.7 3.3l.7-.4 3.4-2L20.6 8c-.3-4.5-4-8-8.6-8S3.7 3.5 3.4 8L.7 9.6l3.1 1.8.9.5c-.5-1-.7-2.1-.7-3.3C4 4.2 7.6.7 11.9.7c4.5 0 8 3.5 8 7.9zM.1 17.3L11.7 24v-7.4L.1 9.9zm12.2-.7V24l11.6-6.7V9.9z"/></svg>