website: add 2022.1.3 release notes

Author: dominikh

website/content/changes/2022.1.md

@@ -83,3 +83,12 @@ This release addresses the following false positives, crashes, infinite loops, a
 
 Additionally it is strongly recommended to use Go 1.18.2 for building Staticcheck, as it fixes further generics-related
 bugs in the type checker.
+
+## Staticcheck 2022.1.3 release notes {#2022.1.3}
+
+This release addresses the following issues:
+
+- Staticcheck maintains a cache to speed up repeated runs. This cache needs to be pruned regularly to keep its size in
+  check. This is meant to happen automatically, but it hasn't since Staticcheck 2020.2. This release corrects that ({{<
+  issue "1283" >}}.)
+- Some type sets containing both bidirectional and unidirectional channels would lead to panics ({{< issue "1304" >}})