Update documentation badges.

docs/index.rst

@@ -1,7 +1,7 @@
 rdata version |version|
 =======================
 
-|build-status| |docs| |coverage| |landscape| |pypi|
+|build-status| |docs| |coverage| |pypi| |zenodo|
 
 Open :code:`.rda` R data files containing datasets and convert them to the appropiate Python objects.
 
@@ -24,10 +24,10 @@ Indices and tables
 * :ref:`modindex`
 * :ref:`search`
 
-.. |build-status| image:: https://api.travis-ci.org/vnmabus/rdata.svg?branch=master
+.. |build-status| image:: https://github.com/vnmabus/rdata/actions/workflows/main.yml/badge.svg?branch=master
     :alt: build status
     :scale: 100%
-    :target: https://travis-ci.org/vnmabus/rdata
+    :target: https://github.com/vnmabus/rdata/actions/workflows/main.yml
 
 .. |docs| image:: https://readthedocs.org/projects/rdata/badge/?version=latest
     :alt: Documentation Status
@@ -39,11 +39,12 @@ Indices and tables
     :scale: 100%
     :target: https://codecov.io/gh/vnmabus/rdata/branch/develop
 
-.. |landscape| image:: https://landscape.io/github/vnmabus/rdata/develop/landscape.svg?style=flat
-   :target: https://landscape.io/github/vnmabus/rdata/develop
-   :alt: Code Health
-
 .. |pypi| image:: https://badge.fury.io/py/rdata.svg
     :alt: Pypi version
     :scale: 100%
     :target: https://pypi.python.org/pypi/rdata/
+
+.. |zenodo| image:: https://zenodo.org/badge/DOI/10.5281/zenodo.6382237.svg
+    :alt: Zenodo DOI
+    :scale: 100%
+    :target: https://doi.org/10.5281/zenodo.6382237