fix(golangci-lint): bump to v1.64.6

Mostly linter bumps, but changelog here:
https://github.com/golangci/golangci-lint/releases/tag/v1.64.6

Author: Edholm

tools/sggolangcilint/tools.go

@@ -17,7 +17,7 @@ import (
 
 const (
 	name    = "golangci-lint"
-	version = "1.64.5"
+	version = "1.64.6"
 )
 
 //go:embed golangci.yml