crypto/x509: update iOS bundled roots to version 55188.40.9

Updates #38843

Change-Id: If76844e1caf23f98d814de89f77610de59d96a34
Reviewed-on: https://go-review.googlesource.com/c/go/+/284134
Trust: Filippo Valsorda <[email protected]>
Run-TryBot: Filippo Valsorda <[email protected]>
Reviewed-by: Dmitri Shuralyov <[email protected]>

Author: FiloSottile

src/crypto/x509/root.go

@@ -4,7 +4,11 @@
 
 package x509
 
-//go:generate go run root_ios_gen.go -version 55161.140.3
+// To update the embedded iOS root store, update the -version
+// argument to the latest security_certificates version from
+// https://opensource.apple.com/source/security_certificates/
+// and run "go generate". See https://golang.org/issue/38843.
+//go:generate go run root_ios_gen.go -version 55188.40.9
 
 import "sync"