Add build section to .readthedocs.yml

Author: sebp

.readthedocs.yml

@@ -5,6 +5,12 @@
 # Required
 version: 2
 
+# Set the OS, Python version and other tools you might need
+build:
+  os: ubuntu-22.04
+  tools:
+    python: mambaforge-22.9
+
 # Build documentation in the docs/ directory with Sphinx
 sphinx:
   builder: html