(DOCS-15062): Finalize 4.0.28 release notes (#468)

jeff-allen-mongo · web-flow · commit 39900660ecd3 · 2022-01-31T16:47:06.000-05:00
* (DOCS-15062): Finalize 4.0.28 release notes

* fix changelog format
diff --git a/source/release-notes/4.0.txt b/source/release-notes/4.0.txt
@@ -15,8 +15,8 @@ Patch Releases
 
 .. _4.0.28-release-notes:
 
-4.0.28 - Upcoming
-~~~~~~~~~~~~~~~~~
+4.0.28 - January 31, 2022
+~~~~~~~~~~~~~~~~~~~~~~~~~
 
 Issues fixed:
 
