update icon: unity (original, original-wordmark, plain, plain-wordmark, line, line-wordmark) (#1273)

* update icon: unity (original, original-wordmark, plain, plain-wordmark, line, line-wordmark) - fix #872

* unity| reviewed size of no wordmark icons

* unity| reviewed size of no wordmark icons

* Update devicon.json

Co-authored-by: Jørgen Kalsnes Hagen <[email protected]>

Author: kilianpaquier

devicon.json

@@ -6530,6 +6530,8 @@
         "name": "unity",
         "altnames": [],
         "tags": [
+	    "C#",
+	    "c-sharp",
             "csharp",
             "engine",
             "game-engine"
@@ -6540,11 +6542,13 @@
                 "original-wordmark"
             ],
             "font": [
-                "original",
-                "original-wordmark"
+                "plain",
+                "plain-wordmark",
+                "line",
+                "line-wordmark"
             ]
         },
-        "color": "#000000",
+        "color": "#4d4d4d",
         "aliases": []
     },
     {