Set build.tools in .readthedocs.yml

Author: dnerini

.readthedocs.yml

@@ -6,6 +6,8 @@ version: 2
 # the build.os and build.tools section is mandatory
 build:
   os: ubuntu-22.04
+  tools:
+    python: 3.8
 
 sphinx:
   configuration: doc/source/conf.py
@@ -14,7 +16,6 @@ formats:
     - htmlzip
 
 python:
-  version: 3.8
   install:
     - requirements: requirements.txt
     - requirements: doc/requirements.txt