docs: add shabith as a contributor for doc (#800)

* docs: update README.md [skip ci]

* docs: update .all-contributorsrc [skip ci]

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

.all-contributorsrc

@@ -533,6 +533,15 @@
       "contributions": [
         "doc"
       ]
+    },
+    {
+      "login": "shabith",
+      "name": "Shabith Ishan Thennakone",
+      "avatar_url": "https://avatars.githubusercontent.com/u/143546?v=4",
+      "profile": "https://shabith.com",
+      "contributions": [
+        "doc"
+      ]
     }
   ],
   "contributorsPerLine": 7,

README.md

@@ -2790,6 +2790,7 @@ Thanks goes to these wonderful people ([emoji key](https://github.com/kentcdodds
     <td align="center"><a href="https://github.com/TomPradat"><img src="https://avatars.githubusercontent.com/u/16164512?v=4?s=100" width="100px;" alt=""/><br /><sub><b>TomPradat</b></sub></a><br /><a href="https://github.com/garmeeh/next-seo/commits?author=TomPradat" title="Code">💻</a></td>
     <td align="center"><a href="https://github.com/PezeM"><img src="https://avatars.githubusercontent.com/u/16854655?v=4?s=100" width="100px;" alt=""/><br /><sub><b>PezeM</b></sub></a><br /><a href="https://github.com/garmeeh/next-seo/commits?author=PezeM" title="Documentation">📖</a></td>
     <td align="center"><a href="https://github.com/darklight147"><img src="https://avatars.githubusercontent.com/u/39389636?v=4?s=100" width="100px;" alt=""/><br /><sub><b>darklight147</b></sub></a><br /><a href="https://github.com/garmeeh/next-seo/commits?author=darklight147" title="Documentation">📖</a></td>
+    <td align="center"><a href="https://shabith.com"><img src="https://avatars.githubusercontent.com/u/143546?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Shabith Ishan Thennakone</b></sub></a><br /><a href="https://github.com/garmeeh/next-seo/commits?author=shabith" title="Documentation">📖</a></td>
   </tr>
 </table>