CHANGELOG.md: Update changelog for release continued

Change-Id: Ib85c505426ce87d42a9c0bc44304c16f720618fb
Reviewed-on: https://go-review.googlesource.com/c/vscode-go/+/380814
Trust: Suzy Mueller <suzmue@golang.org>
Run-TryBot: Suzy Mueller <suzmue@golang.org>
TryBot-Result: kokoro <noreply+kokoro@google.com>
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
(cherry picked from commit b5b4835b048a608c56a61b4562c38cacaade4773)
Reviewed-on: https://go-review.googlesource.com/c/vscode-go/+/380815
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 19510a5..f9542cc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,6 @@
-## v0.31.0 - 20 Jan, 2022
+## v0.31.0 - 26 Jan, 2022
+
+A list of all issues and changes can be found in the [v0.31.0 milestone](https://github.com/golang/vscode-go/milestone/41) and [commit history](https://github.com/golang/vscode-go/compare/v0.30.0...v0.31.0).
 
 ### Fixes