Add Xfce icon (#1404) (#1876)

* Added xfce.svg

* Updated _data/simple-icons.json

_data/simple-icons.json

@@ -3821,6 +3821,11 @@
             "hex": "13B5EA",
             "source": "https://www.xero.com/uk/about/media/downloads"
         },
+        {
+            "title": "XFCE",
+            "hex": "2284F2",
+            "source": "https://www.xfce.org/download#artwork"
+        },
         {
             "title": "Xiaomi",
             "hex": "FA6709",

icons/xfce.svg

@@ -0,0 +1 @@
+<svg role="img" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><title>XFCE icon</title><path d="M.01 5.756c-.128.07 1.019.82 3.161 1.706 2.143.886 5.103 3.13 4.87 3.493-.695.984-1.105 2.162-.822 4.178.051.355-1.047.97-.968 1.506.067.408 1.228-.403 1.355-.243.078.288-.621 1.743-.338 1.847.206.062 2.023-1.73 2.129-1.7 2.995.908 6.892.222 6.967.194-.007-.016 2.804 1.326 3.049 1.166.616-.67-1.169-1.615-.871-1.992.13-.198 2.173.742 2.274.485.146-.443-.948-1.375-1.113-1.651-.143-.255-.174-.666.194-.924.367-.257 4.125-1.7 3.967-2.818-.272-2.03-4.766-2.161-4.839-2.332-.034-.08.199-2.902-1.112-2.38-.808.301-.15 2.099-.097 2.332.048.214-.359.19-.436.097-.17-.21-.736-2.084-1.403-1.75-.935.518-.055 2.135-.242 2.187-.346.195-.326.67-.604 1.056-.458.66-3.886-.309-4.994-.376-.811-.048-1.586.62-1.66.535-.987-.993-3.03-2.722-5.27-3.297C1.953 6.733.086 5.743.01 5.755zm22.866 1.816c-.068-.018-.382 1.593-.234 1.665.13.097.355-1.576.237-1.662l-.003-.002zm1.107.213c-.17-.003-1.076 1.449-.867 1.603.129.098.937-1.543.881-1.598a.024.024 0 00-.014-.005zm-4.385 1.768a.388.444 0 01.388.443.388.444 0 01-.388.444.388.444 0 01-.388-.444.388.444 0 01.388-.443zm-.871.27c.165.714.422.94 1.194.918-.983.905-1.58-.645-1.194-.919zm2.125 1.867c.04 0 .071.011.092.03.387.141-1.664.883-1.678.778-.021-.075 1.197-.823 1.586-.808zm.208.475a.1.1 0 01.056.009c.365.364-1.157 1.173-1.14 1.144-.123-.074.766-1.129 1.084-1.154z"/></svg>