Add Hexlet icon (#9296)

_data/simple-icons.json

@@ -5555,6 +5555,16 @@
             "hex": "D50C2D",
             "source": "https://www.hetzner.com"
         },
+        {
+            "title": "Hexlet",
+            "hex": "116EF5",
+            "source": "https://hexlet.io",
+            "aliases": {
+                "loc": {
+                    "ru-RU": "Хекслет"
+                }
+            }
+        },
         {
             "title": "Hexo",
             "hex": "0E83CD",

icons/hexlet.svg

@@ -0,0 +1 @@
+<svg role="img" viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg"><title>Hexlet</title><path d="M 19.774648,3.0422535 12,0 4.225352,3.0422535 12,5.7464789 Z m -3.042254,4.056338 V 13.521127 H 7.2676055 V 7.0985915 L 4.5633802,6.084507 V 24 H 7.2676055 V 16.225352 H 16.732394 V 24 H 19.43662 V 6.084507 Z"/></svg>