website: add 2023.1.5 release notes

Author: dominikh

website/content/changes/2023.1.md

@@ -73,3 +73,9 @@ This release **adds support for Go 1.21** and fixes the following bugs:
 - A crash involving generics ({{< issue "1410" >}})
 - A false positive in {{< check "SA9001" >}} involving control flow statements ({{< issue "488" >}})
 - A false positive in {{< check "ST1003" >}}, complaining about the names of fuzz functions ({{< issue "1420" >}}))
+
+## Staticcheck 2023.1.5 release notes {#2023.1.5}
+
+This release fixes the following bug:
+
+- A crash involving methods named `_`