Fix yaml error.

jeromekelleher · jeromekelleher · commit 7b5509f6c3a2 · 2019-11-22T13:55:10.000Z
diff --git a/.readthedocs.yml b/.readthedocs.yml
@@ -9,5 +9,5 @@ sphinx:
 
   python:
     version: 3.7
-      install:
-        - requirements: docs/rtd_requirements.txt
+    install:
+      - requirements: docs/rtd_requirements.txt
