update readthedocs.txt

readthedocs.yml

@@ -4,16 +4,6 @@
 # Required
 version: 2
 
-# Set the OS, Python version and other tools you might need
-build:
-  os: ubuntu-22.04
-  tools:
-    python: "3.12"
-    # You can also specify other tool versions:
-    # nodejs: "20"
-    # rust: "1.70"
-    # golang: "1.20"
-
 # Build documentation in the "docs/" directory with Sphinx
 sphinx:
   configuration: docs/conf.py
@@ -31,5 +21,6 @@ sphinx:
 # to build your documentation
 # See https://docs.readthedocs.io/en/stable/guides/reproducible-builds.html
 python:
+  version: "3.12"
   install:
     - requirements: docs/source/requirements.txt