Add Scala icons

Author: weh

devicon-colors.css

@@ -566,3 +566,7 @@
 .devicon-rust-plain.colored {
 	color: #000000;
 }
+.devicon-scala-plain-wordmark.colored,
+.devicon-scala-plain.colored {
+	color: #de3423;
+}

devicon.json

@@ -790,6 +790,14 @@
       "font": ["original"]
     }
   },
+  {
+    "name": "scala",
+    "tags": ["programming", "language"],
+    "versions": {
+      "svg": ["original", "original-wordmark", "plain", "plain-wordmark"],
+      "font": ["plain", "plain-wordmark"]
+    }
+  },
   {
     "name": "sequelize",
     "tags": ["database", "language"],