docs: add @dkmansion as a contributor

.all-contributorsrc

@@ -3910,6 +3910,15 @@
       "contributions": [
         "code"
       ]
+    },
+    {
+      "login": "dkmansion",
+      "name": "D M",
+      "avatar_url": "https://avatars.githubusercontent.com/u/5826629?v=4",
+      "profile": "https://github.com/dkmansion",
+      "contributions": [
+        "code"
+      ]
     }
   ]
 }

CONTRIBUTORS.md

@@ -559,6 +559,7 @@ Thanks goes to all of these wonderful people ([emoji key](https://github.com/ken
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/bricelabelle"><img src="https://avatars.githubusercontent.com/u/28403467?v=4?s=110" width="110px;" alt="bricelabelle"/><br /><sub><b>bricelabelle</b></sub></a><br /><a href="https://github.com/snipe/snipe-it/commits?author=bricelabelle" title="Code">💻</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/corydlamb"><img src="https://avatars.githubusercontent.com/u/97770090?v=4?s=110" width="110px;" alt="corydlamb"/><br /><sub><b>corydlamb</b></sub></a><br /><a href="https://github.com/snipe/snipe-it/commits?author=corydlamb" title="Code">💻</a></td>
       <td align="center" valign="top" width="14.28%"><a href="http://twitter.com/splash"><img src="https://avatars.githubusercontent.com/u/1154133?v=4?s=110" width="110px;" alt="Diogenes S. Jesus"/><br /><sub><b>Diogenes S. Jesus</b></sub></a><br /><a href="https://github.com/snipe/snipe-it/commits?author=splashx" title="Code">💻</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/dkmansion"><img src="https://avatars.githubusercontent.com/u/5826629?v=4?s=110" width="110px;" alt="D M"/><br /><sub><b>D M</b></sub></a><br /><a href="https://github.com/snipe/snipe-it/commits?author=dkmansion" title="Code">💻</a></td>
     </tr>
   </tbody>
 </table>