docs: add leogtzr as a contributor (#1397)

* docs: update README.md [skip ci]

* docs: update .all-contributorsrc [skip ci]
Co-authored-by: Nallcontributors[bot] <46447321+allcontributors[bot]@users.noreply.github.com>
Co-authored-by: NIlkka Seppälä <ilkka.seppala@gofore.com>

.all-contributorsrc

@@ -291,6 +291,15 @@
         "code"
       ]
     },
+    {
+      "login": "leogtzr",
+      "name": "Leo Gutiérrez Ramírez",
+      "avatar_url": "https://avatars0.githubusercontent.com/u/1211969?v=4",
+      "profile": "https://github.com/leogtzr",
+      "contributions": [
+        "code"
+      ]
+    },
     {
       "login": "npczwh",
       "name": "Zhang WH",

README.md

@@ -146,6 +146,9 @@ This project is licensed under the terms of the MIT license.
     <td align="center"><a href="https://github.com/giorgosmav21"><img src="https://avatars2.githubusercontent.com/u/22855493?v=4" width="100px;" alt=""/><br /><sub><b>George Mavroeidis</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=giorgosmav21" title="Code">💻</a></td>
     <td align="center"><a href="https://github.com/oconnelc"><img src="https://avatars0.githubusercontent.com/u/1112973?v=4" width="100px;" alt=""/><br /><sub><b>Christopher O'Connell</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=oconnelc" title="Code">💻</a></td>
   </tr>
+  <tr>
+    <td align="center"><a href="https://github.com/leogtzr"><img src="https://avatars0.githubusercontent.com/u/1211969?v=4" width="100px;" alt=""/><br /><sub><b>Leo Gutiérrez Ramírez</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=leogtzr" title="Code">💻</a></td>
+  </tr>
 </table>
 
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