Homogenize markup used for section headings

Plus other minor cleanups

Change-Id: I356642e8d4c379ffb1b70789cba24497a7f8f393
diff --git a/requirements.txt b/requirements.txt
index 3b2379e..7639064 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1,2 @@
-furo == 2022.9.15
+furo == 2022.9.29
 sphinx ~= 5.0