Merge pull request #347 from fonttools/fix-doc-building

Fix readthedocs configuration

.readthedocs.yml

@@ -4,12 +4,16 @@
 # Required
 version: 2
 
+build:
+  os: ubuntu-24.04
+  tools:
+    python: "3.12"
+
 # Build documentation in the docs/ directory with Sphinx
 sphinx:
   configuration: docs/source/conf.py
 
 # Optionally set the version of Python and requirements required to build your docs
 python:
-  version: 3.6
   install:
     - requirements: docs/requirements.txt