[TEST] ENH: Upgrade Myst-NB

setup.cfg

@@ -41,7 +41,7 @@ install_requires =
     # Include Jupytext to ensure users have the right version, even if not strictly necessary
     jupytext>=1.11.2,<1.12  #markdown-it-py~=1 required and support from 1.11.2
     linkify-it-py~=1.0.1
-    myst-nb~=0.13.1
+    myst-nb>=0.13.1
     pyyaml
     sphinx>=3,<5
     sphinx-comments