Set tentative release date for 5.3.1

sbrannen · sbrannen · commit 388268011e6f · 2018-09-09T15:43:17.000+02:00
diff --git a/documentation/src/docs/asciidoc/release-notes/release-notes-5.3.1.adoc b/documentation/src/docs/asciidoc/release-notes/release-notes-5.3.1.adoc
@@ -1,7 +1,7 @@
 [[release-notes-5.3.1]]
 == 5.3.1
 
-*Date of Release:* September ❓, 2018
+*Date of Release:* September 9, 2018
 
 *Scope:* Bug fixes since 5.3.0
 
