📝 Add omerrbbulut as a contributor for doc (#1311)

Adds @omerrbbulut as a contributor for doc.

This was requested by phlptp [in this
comment](#1310 (comment))

[skip ci]

---------

Co-authored-by: allcontributors[bot] <46447321+allcontributors[bot]@users.noreply.github.com>

Author: allcontributors[bot]

.all-contributorsrc

@@ -969,6 +969,16 @@
       "contributions": [
         "code"
       ]
+    },
+    {
+      "login": "omerrbbulut",
+      "name": "Ömer BULUT",
+      "avatar_url": "https://avatars.githubusercontent.com/u/41139691?v=4",
+      "profile": "https://github.com/omerrbbulut",
+      "contributions": [
+        "doc",
+        "code"
+      ]
     }
   ],
   "contributorsSortAlphabetically": true,

README.md

@@ -1943,6 +1943,7 @@ thanks to all the contributors
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/ryan4729"><img src="https://avatars3.githubusercontent.com/u/40183301?v=4?s=100" width="100px;" alt="ryan4729"/><br /><sub><b>ryan4729</b></sub></a><br /><a href="https://github.com/CLIUtils/CLI11/commits?author=ryan4729" title="Tests">⚠️</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/shameekganguly"><img src="https://avatars.githubusercontent.com/u/2412842?v=4?s=100" width="100px;" alt="shameekganguly"/><br /><sub><b>shameekganguly</b></sub></a><br /><a href="https://github.com/CLIUtils/CLI11/commits?author=shameekganguly" title="Code">💻</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/tansy"><img src="https://avatars.githubusercontent.com/u/40426919?v=4?s=100" width="100px;" alt="tansy"/><br /><sub><b>tansy</b></sub></a><br /><a href="https://github.com/CLIUtils/CLI11/commits?author=tansy" title="Code">💻</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/omerrbbulut"><img src="https://avatars.githubusercontent.com/u/41139691?v=4?s=100" width="100px;" alt="Ömer BULUT"/><br /><sub><b>Ömer BULUT</b></sub></a><br /><a href="https://github.com/CLIUtils/CLI11/commits?author=omerrbbulut" title="Documentation">📖</a> <a href="https://github.com/CLIUtils/CLI11/commits?author=omerrbbulut" title="Code">💻</a></td>
     </tr>
   </tbody>
 </table>