Update .readthedocs.yml

Author: jofmi

.readthedocs.yml

@@ -3,9 +3,8 @@ formats: all
 build:
   os: ubuntu-22.04 # Or ubuntu-20.04
   tools:
-    python: "3.7" # Adjust based on your project
+    python: "3.9" # Adjust based on your project
 python:
-  version: 3.7
   system_packages: true
   install:
     - method: pip