DOC: fix two Jupytext links

Author: mgeier

doc/a-markdown-file.md

@@ -11,7 +11,7 @@ files via [custom notebook formats](custom-formats.pct.py).
 You only need to install the [jupytext](https://jupytext.readthedocs.io/)
 package and add a configuration setting to `conf.py`,
 which can be used to select one of
-[several Markdown flavors supported by jupytext](https://jupytext.readthedocs.io/en/latest/formats.html#markdown-formats)
+[several Markdown flavors supported by jupytext](https://jupytext.readthedocs.io/en/latest/formats-markdown.html)
 (here we are using R Markdown):
 
 ```python

doc/custom-formats.pct.py

@@ -56,7 +56,7 @@
 # %% [markdown]
 # This very page is an example of a notebook stored in the
 # `py:percent` format
-# (see [docs](https://jupytext.readthedocs.io/en/latest/formats.html#the-percent-format)):
+# (see [docs](https://jupytext.readthedocs.io/en/latest/formats-scripts.html#the-percent-format)):
 
 # %%
 # !head -20 custom-formats.pct.py