Sentence case

Author: hugovk

Doc/whatsnew/3.15.rst

@@ -73,7 +73,7 @@ Summary -- Release highlights
   profiling tools <whatsnew315-profiling-package>`
 * :pep:`799`: :ref:`Tachyon: High frequency statistical sampling profiler
   <whatsnew315-sampling-profiler>`
-* :pep:`798`: :ref:`Unpacking in Comprehensions
+* :pep:`798`: :ref:`Unpacking in comprehensions
   <whatsnew315-unpacking-in-comprehensions>`
 * :pep:`686`: :ref:`Python now uses UTF-8 as the default encoding
   <whatsnew315-utf8-default>`