Sanitize message in email template (#19304)

go.mod

@@ -71,6 +71,7 @@ require (
 	github.com/mattn/go-colorable v0.1.12 // indirect
 	github.com/mattn/go-runewidth v0.0.13 // indirect
 	github.com/mholt/archiver/v3 v3.5.1
+	github.com/microcosm-cc/bluemonday v1.0.2
 	github.com/miekg/dns v1.1.43 // indirect
 	github.com/minio/md5-simd v1.1.2 // indirect
 	github.com/minio/minio-go/v7 v7.0.16