docs: update README.md [skip ci]

README.md

@@ -2,7 +2,7 @@
 [![DOI](https://zenodo.org/badge/DOI/10.5281/zenodo.3608611.svg)](https://doi.org/10.5281/zenodo.3608611)
 [![made-with-datalad](https://www.datalad.org/badges/made_with.svg)](https://datalad.org)
 <!-- ALL-CONTRIBUTORS-BADGE:START - Do not remove or modify this section -->
-[![All Contributors](https://img.shields.io/badge/all_contributors-51-orange.svg?style=flat-square)](#contributors-)
+[![All Contributors](https://img.shields.io/badge/all_contributors-52-orange.svg?style=flat-square)](#contributors-)
 <!-- ALL-CONTRIBUTORS-BADGE:END --> 
 
 # The DataLad handbook :orange_book:
@@ -126,6 +126,7 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
     <tr>
       <td align="center"><a href="https://twitter.com/complexbrains"><img src="https://avatars.githubusercontent.com/u/45263281?v=4?s=100" width="100px;" alt="Isil Bilgin"/><br /><sub><b>Isil Bilgin</b></sub></a><br /><a href="https://github.com/datalad-handbook/book/issues?q=author%3Acomplexbrains" title="Bug reports">🐛</a> <a href="#maintenance-complexbrains" title="Maintenance">🚧</a></td>
       <td align="center"><a href="http://juliankosciessa.eu"><img src="https://avatars.githubusercontent.com/u/40263608?v=4?s=100" width="100px;" alt="Julian Kosciessa"/><br /><sub><b>Julian Kosciessa</b></sub></a><br /><a href="#content-jkosciessa" title="Content">🖋</a></td>
+      <td align="center"><a href="https://github.com/candleindark"><img src="https://avatars.githubusercontent.com/u/12135617?v=4?s=100" width="100px;" alt="Isaac To"/><br /><sub><b>Isaac To</b></sub></a><br /><a href="#maintenance-candleindark" title="Maintenance">🚧</a></td>
     </tr>
   </tbody>
 </table>