readthedocs.yml: explicit Sphinx configuration

Prompted by deprecation of RTD's auto-detection of Sphinx configs <https://about.readthedocs.com/blog/2024/12/deprecate-config-files-without-sphinx-or-mkdocs-config/>
nextstrain · Dec 18, 2024 · a121171 · a121171
1 parent e55461b
commit a121171
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/readthedocs.yml b/readthedocs.yml
@@ -8,3 +8,6 @@ build:
 
 conda:
   environment: docs/conda.yml
+
+sphinx:
+  configuration: docs/conf.py