fix: bump gotd/td for business-update qts=0 loop fix

Pull in gotd/td 5e4cd68 (fix(updates): do not reset qts state on qts=0
updates). Bot business updates carry qts=0 in updates.difference, which reset
gotd's qts sequence to 0 and looped getDifference forever, so the business bot
replied to the whole backlog repeatedly. The library-side businessSeen dedup
remains as a defensive backstop.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: ernado

go.mod

@@ -9,7 +9,7 @@ require (
 	github.com/gotd/contrib v0.21.1
 	github.com/gotd/log v0.1.0
 	github.com/gotd/log/logzap v0.1.1
-	github.com/gotd/td v0.156.2
+	github.com/gotd/td v0.156.4-0.20260614193908-5e4cd68a6720
 	github.com/gotd/teled v0.5.0
 	github.com/stretchr/testify v1.11.1
 	go.etcd.io/bbolt v1.4.3

go.sum

@@ -92,8 +92,8 @@ github.com/gotd/log/logzap v0.1.1 h1:O6l7d8HUbODe+UMcrM47eXYDwdJ6RNmpQejLjrlcEIQ
 github.com/gotd/log/logzap v0.1.1/go.mod h1:5ObZkITbfhbsBOLzBkzmMk9QxXc0eNQpimau7zRL+Y8=
 github.com/gotd/neo v0.1.5 h1:oj0iQfMbGClP8xI59x7fE/uHoTJD7NZH9oV1WNuPukQ=
 github.com/gotd/neo v0.1.5/go.mod h1:9A2a4bn9zL6FADufBdt7tZt+WMhvZoc5gWXihOPoiBQ=
-github.com/gotd/td v0.156.2 h1:07bZ5YnuKjStRHJ1d8IyU19KZMLs1vZslT9dQeUAcaw=
-github.com/gotd/td v0.156.2/go.mod h1:pVVlJYiMUMinSR/5uDfCSUoB3DyqxftanMWYLP16riY=
+github.com/gotd/td v0.156.4-0.20260614193908-5e4cd68a6720 h1:g+FwLfBSJ0CvXCMqRv/qx+RNgmVdk66AkIdGbrRWJtM=
+github.com/gotd/td v0.156.4-0.20260614193908-5e4cd68a6720/go.mod h1:pVVlJYiMUMinSR/5uDfCSUoB3DyqxftanMWYLP16riY=
 github.com/gotd/teled v0.5.0 h1:jcO5sMVPCKLMBvBOrauhPzGIaxv6bxvmkJ6V9cftKto=
 github.com/gotd/teled v0.5.0/go.mod h1:7jbroRefOZTTvWZiQrBxyThCcIa1USrLfhEG8Gt7taU=
 github.com/jackc/pgerrcode v0.0.0-20240316143900-6e2875d9b438 h1:Dj0L5fhJ9F82ZJyVOmBx6msDp/kfd1t9GRfny/mfJA0=