Apply suggestions from code review

Co-authored-by: Adam Turner <9087854+AA-Turner@users.noreply.github.com>

Author: hugovk

run_release.py

@@ -154,8 +154,8 @@
   TODO
 
 
-
 .. Add deprecations above alphabetically, not here at the end.
+
 Removed
 =======
 
@@ -188,14 +188,15 @@
 
 * TODO
 
-Deprecated
-----------
+Deprecated C APIs
+-----------------
 
 * TODO
 
 .. Add C API deprecations above alphabetically, not here at the end.
-Removed
--------
+
+Removed C APIs
+--------------
 
 """