Merge pull request #78 from pllim/patch-1

Add APE 20 to README

Author: eteq

README.rst

@@ -32,6 +32,7 @@ Accepted APEs
 17  `A roadmap for package infrastructure without astropy-helpers`_  2019-Dec-12 |APE 17 DOI|
 18  `Adopt NEP 29 for CPython and Numpy Version Support`_            2021-Dec-25 |APE 18 DOI|
 19  `Distributing Astropy Project Funding`_                          2022-Feb-28 |APE 19 DOI|
+20  `Formatting Code with Black`_                                    2022-Sep-23 |APE 20 DOI|
 === ================================================================ =========== ============
 
 .. _The Astropy Project Governance Charter: https://github.com/astropy/astropy-APEs/blob/main/APE0.rst
@@ -51,6 +52,7 @@ Accepted APEs
 .. _A roadmap for package infrastructure without astropy-helpers: https://github.com/astropy/astropy-APEs/blob/main/APE17.rst
 .. _Adopt NEP 29 for CPython and Numpy Version Support: https://github.com/astropy/astropy-APEs/blob/main/APE18.rst
 .. _Distributing Astropy Project Funding: https://github.com/astropy/astropy-APEs/blob/main/APE19.rst
+.. _Formatting Code with Black: https://github.com/astropy/astropy-APEs/blob/main/APE20.rst
 
 .. |APE 0 DOI| image:: https://zenodo.org/badge/DOI/10.5281/zenodo.4552790.svg
    :target: https://doi.org/10.5281/zenodo.4552790
@@ -103,6 +105,9 @@ Accepted APEs
 .. |APE 19 DOI| image:: https://zenodo.org/badge/DOI/10.5281/zenodo.6312048.svg
    :target: https://doi.org/10.5281/zenodo.6312048
 
+.. |APE 20 DOI| image:: https://zenodo.org/badge/DOI/10.5281/zenodo.7195739.svg
+   :target: https://doi.org/10.5281/zenodo.7195739
+
 Proposing a new APE
 ^^^^^^^^^^^^^^^^^^^