1.21.1 change log (#3501)

* 1.21.1 changelog

* Address PR feedback

content/telegraf/v1.21/about_the_project/release-notes-changelog.md

@@ -10,6 +10,16 @@ menu:
     weight: 10
     parent: About the project
 ---
+## v1.21 [2021-12-16]
+
+## Bug fixes
+- Fix panic in parsers due to missing log.
+- Update `go-sensu module` to v2.12.0
+- Fix typo in OpenStack input plugin.
+
+## Features
+- Add SMART input plugin concurrency configuration option, `nvme-cli v1.14+` support, and lint fixes.
+
 ## v1.21 [2021-12-15]
 
 {{% note %}}

data/products.yml

@@ -35,7 +35,7 @@ telegraf:
   versions: [v1.9, v1.10, v1.11, v1.12, v1.13, v1.14, v1.15, v1.16, v1.17, v1.18, v1.19, v1.20, v1.21]
   latest: v1.21
   latest_patches:
-    "1.21": 0
+    "1.21": 1
     "1.20": 4
     "1.19": 3
     "1.18": 3