Revert "Adjust configuration for oEmbedPy Sphinx plugin after updating to 0.8"

This reverts commit 4698105.

Author: amotl

src/crate/theme/rtd/conf/__init__.py

@@ -34,7 +34,7 @@
 
 extensions = [
     "myst_nb",
-    "oembedpy.adapters.sphinx",
+    "oembedpy.ext.sphinx",
     "sphinx_copybutton",
     "sphinx_design",
     "sphinx_design_elements",