(DOCS-14959): Add release date for 5.1.1 (#176)

jeff-allen-mongo · web-flow · commit 94fe44e28b6b · 2021-12-22T14:07:31.000-05:00
diff --git a/source/release-notes/5.1.txt b/source/release-notes/5.1.txt
@@ -21,8 +21,8 @@ Minor Releases
 
 .. _5.1.1-release-notes:
 
-5.1.1 - Upcoming
-~~~~~~~~~~~~~~~~
+5.1.1 - December 9, 2021
+~~~~~~~~~~~~~~~~~~~~~~~~
 
 Issues fixed:
 
