update icon: nano (original, plain, plain-wordmark) (#1619)

* Update nano icon to fix #1613

* Add `plain` and `plain-wordmark` versions

* Update nano-original-wordmark.svg

---------

Co-authored-by: unknown <joseliojrx25@gmail.com>
Co-authored-by: Josélio Júnior <76992016+lunatic-fox@users.noreply.github.com>

devicon.json

@@ -5635,24 +5635,17 @@
         "versions": {
             "svg": [
                 "original",
-                "original-wordmark"
+                "original-wordmark",
+                "plain",
+                "plain-wordmark"
             ],
             "font": [
-                "original",
-                "original-wordmark"
+                "plain",
+                "plain-wordmark"
             ]
         },
         "color": "#C8F",
-        "aliases": [
-            {
-                "base": "original",
-                "alias": "plain"
-            },
-            {
-                "base": "original-wordmark",
-                "alias": "plain-wordmark"
-            }
-        ]
+        "aliases": []
     },
     {
         "name": "neo4j",