docs: add dmail00 as a contributor for bug (#513)

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

.all-contributorsrc

@@ -606,6 +606,15 @@
       "contributions": [
         "bug"
       ]
+    },
+    {
+      "login": "dmail00",
+      "name": "dmail00",
+      "avatar_url": "https://avatars.githubusercontent.com/u/79044603?v=4",
+      "profile": "https://github.com/dmail00",
+      "contributions": [
+        "bug"
+      ]
     }
   ],
   "contributorsPerLine": 7,

README.md

@@ -192,6 +192,7 @@ This library could only exist thanks to the dedication of many volunteers around
     <td align="center"><a href="https://github.com/semaeostomea"><img src="https://avatars.githubusercontent.com/u/100974908?v=4?s=100" width="100px;" alt=""/><br /><sub><b>semaeostomea</b></sub></a><br /><a href="https://github.com/PyFPDF/fpdf2/commits?author=semaeostomea" title="Documentation">📖</a></td>
     <td align="center"><a href="https://github.com/Jmillan-Dev"><img src="https://avatars.githubusercontent.com/u/39383390?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Josué Millán Zamora</b></sub></a><br /><a href="https://github.com/PyFPDF/fpdf2/commits?author=Jmillan-Dev" title="Code">💻</a></td>
     <td align="center"><a href="https://github.com/me-suzy"><img src="https://avatars.githubusercontent.com/u/2770489?v=4?s=100" width="100px;" alt=""/><br /><sub><b>me-suzy</b></sub></a><br /><a href="https://github.com/PyFPDF/fpdf2/issues?q=author%3Ame-suzy" title="Bug reports">🐛</a></td>
+    <td align="center"><a href="https://github.com/dmail00"><img src="https://avatars.githubusercontent.com/u/79044603?v=4?s=100" width="100px;" alt=""/><br /><sub><b>dmail00</b></sub></a><br /><a href="https://github.com/PyFPDF/fpdf2/issues?q=author%3Admail00" title="Bug reports">🐛</a></td>
   </tr>
 </table>