Add release date to CHANGELOG.md

benrimmington · benrimmington · commit fd7d412a6847 · 2019-09-25T16:35:25.000+01:00
<https://swift.org/blog/swift-5-1-released/>
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -145,6 +145,8 @@ Swift Next
 Swift 5.1
 ---------
 
+### 2019-09-20 (Xcode 11.0)
+
 * [SR-8974][]:
 
   Duplicate tuple element labels are no longer allowed, because it leads
