build(docs): have to install ourselves for api docs

Author: nedbat

.readthedocs.yaml

@@ -22,3 +22,5 @@ formats: all
 python:
   install:
     - requirements: doc/requirements.pip
+    - method: pip
+      path: .

CHANGES.rst

@@ -27,6 +27,10 @@ Unreleased
   <starbad_>`_, who `provided patient detailed diagnosis <pull 1650_>`_ and
   graciously agreed to a pragmatic resolution.
 
+- The API docs were missing from the last version. They are now `restored
+  <apidocs_>`_.
+
+.. _apidocs: https://coverage.readthedocs.io/en/latest/api_coverage.html
 .. _starbad: https://github.com/nedbat/coveragepy/issues/1407#issuecomment-1631085209
 .. _pull 1650: https://github.com/nedbat/coveragepy/pull/1650