Merge pull request #242 from FoamyGuy/docs_container_version_fix

Update rtd build container configuration value

Author: tannewt

{{ cookiecutter.__dirname }}/{% if cookiecutter.sphinx_docs in ['y', 'yes'] %}.readthedocs.yaml{% endif %}

@@ -9,7 +9,7 @@
 version: 2
 
 build:
-  os: ubuntu-latest
+  os: ubuntu-lts-latest
   tools:
     python: "3"