Use dirhtml on RTD

.readthedocs.yaml

@@ -9,6 +9,7 @@ build:
 # Build documentation in the docs/ directory with Sphinx
 sphinx:
   configuration: docs/conf.py
+  builder: dirhtml
 
 # Optionally declare the Python requirements required to build your docs
 python:

README.md

@@ -15,7 +15,7 @@ For more background and information, see [jointakahe.org](https://jointakahe.org
 
 ## Deployment
 
-See [our deployment documentation](https://takahe-server.readthedocs.io/en/latest/installation/)
+See [our deployment documentation](https://takahe-server.readthedocs.io/en/latest/installation/).
 
 
 ## Roadmap