use doc/requirements.txt when building with readthedocs

Nick L. Petroni, Jr · Nick L. Petroni, Jr · commit 79a549f21170 · 2022-01-16T18:18:07.000-05:00
diff --git a/.readthedocs.yml b/.readthedocs.yml
@@ -16,7 +16,4 @@ formats: all
 python:
   version: 3.7
   install:
-    - method: pip
-      path: .
-      extra_requirements:
-        - doc
+    - requirements: doc/requirements.txt
