docs: add alexgalkin as a contributor (#66)

Author: allcontributors[bot]

.all-contributorsrc

@@ -15,6 +15,15 @@
         "review",
         "translation"
       ]
+    },
+    {
+      "login": "alexgalkin",
+      "name": "Alex Galkin",
+      "avatar_url": "https://avatars0.githubusercontent.com/u/1190812?v=4",
+      "profile": "https://github.com/alexgalkin",
+      "contributions": [
+        "translation"
+      ]
     }
   ],
   "contributorsPerLine": 7,

README.md

@@ -1,6 +1,6 @@
 # Сучасний посібник по JavaScript українською мовою
 <!-- ALL-CONTRIBUTORS-BADGE:START - Do not remove or modify this section -->
-[![All Contributors](https://img.shields.io/badge/all_contributors-1-orange.svg?style=flat-square)](#contributors-)
+[![All Contributors](https://img.shields.io/badge/all_contributors-2-orange.svg?style=flat-square)](#contributors-)
 <!-- ALL-CONTRIBUTORS-BADGE:END -->
 
 В цьому репозиторію зберігається переклад <https://javascript.info> на українську мову.
@@ -72,6 +72,7 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
 <table>
   <tr>
     <td align="center"><a href="https://github.com/tarasyyyk"><img src="https://avatars0.githubusercontent.com/u/20100011?v=4" width="100px;" alt=""/><br /><sub><b>Taras</b></sub></a><br /><a href="#maintenance-tarasyyyk" title="Maintenance">🚧</a> <a href="https://github.com/javascript-tutorial/uk.javascript.info/pulls?q=is%3Apr+reviewed-by%3Atarasyyyk" title="Reviewed Pull Requests">👀</a> <a href="#translation-tarasyyyk" title="Translation">🌍</a></td>
+    <td align="center"><a href="https://github.com/alexgalkin"><img src="https://avatars0.githubusercontent.com/u/1190812?v=4" width="100px;" alt=""/><br /><sub><b>Alex Galkin</b></sub></a><br /><a href="#translation-alexgalkin" title="Translation">🌍</a></td>
   </tr>
 </table>