docs/md/contributors: add a8m as a contributor

.all-contributorsrc

@@ -13,6 +13,17 @@
       "contributions": [
         "code"
       ]
+    },
+    {
+      "login": "a8m",
+      "name": "Ariel Mashraki",
+      "avatar_url": "https://avatars.githubusercontent.com/u/7413593?v=4",
+      "profile": "http://entgo.io",
+      "contributions": [
+        "maintenance",
+        "code",
+        "doc"
+      ]
     }
   ],
   "contributorsPerLine": 7,

doc/md/contributors.md

@@ -11,6 +11,7 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
 <table>
   <tr>
     <td align="center"><a href="https://rotemtam.com"><img src="https://avatars.githubusercontent.com/u/1522681?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Rotem Tamir</b></sub></a><br /><a href="https://github.com/ent/ent/commits?author=rotemtam" title="Code">💻</a></td>
+    <td align="center"><a href="http://entgo.io"><img src="https://avatars.githubusercontent.com/u/7413593?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Ariel Mashraki</b></sub></a><br /><a href="#maintenance-a8m" title="Maintenance">🚧</a> <a href="https://github.com/ent/ent/commits?author=a8m" title="Code">💻</a> <a href="https://github.com/ent/ent/commits?author=a8m" title="Documentation">📖</a></td>
   </tr>
 </table>