Update CHANGELOG.md and tagging release

jamiescode · jamiescode · commit 54259c066fb6 · 2021-08-13T17:15:06.000+01:00
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -16,6 +16,8 @@ Allowed headings:
 
 ## [Unreleased]
 
+## [3.17.1] - 2021-08-13
+
 * Updated `hmrc_grey_1` colour to match the GOV palette 
 
 ## [3.17.0] - 2021-07-26
