Merge pull request #2306 from verilog-to-routing/fix_rtd

fix readthedocs build

Author: duck2

.readthedocs.yaml

@@ -14,7 +14,11 @@ sphinx:
 formats: all
 
 # Optionally set the version of Python and requirements required to build your docs
+build:
+  os: ubuntu-22.04
+  tools:
+    python: "3.11"
+
 python:
-  version: 3.8
   install:
     - requirements: doc/requirements.txt