Fix snell v5 stream payload pacing

Author: nekohasekai

go.mod

@@ -50,7 +50,7 @@ require (
 	github.com/sagernet/sing-shadowsocks v0.2.8
 	github.com/sagernet/sing-shadowsocks2 v0.2.1
 	github.com/sagernet/sing-shadowtls v0.2.1
-	github.com/sagernet/sing-snell v0.0.0-20260709045721-90e5a65e1f85
+	github.com/sagernet/sing-snell v0.0.0-20260710053050-c537637554f3
 	github.com/sagernet/sing-tun v0.8.12-0.20260710042924-375e9ae639c5
 	github.com/sagernet/sing-usbip v0.0.0-20260616101517-efb91521eddb
 	github.com/sagernet/sing-vmess v0.2.8-0.20250909125414-3aed155119a1

go.sum

@@ -284,8 +284,8 @@ github.com/sagernet/sing-shadowsocks2 v0.2.1 h1:dWV9OXCeFPuYGHb6IRqlSptVnSzOelnq
 github.com/sagernet/sing-shadowsocks2 v0.2.1/go.mod h1:RnXS0lExcDAovvDeniJ4IKa2IuChrdipolPYWBv9hWQ=
 github.com/sagernet/sing-shadowtls v0.2.1 h1:ZiHZdnEnP+YS73NMsxiZmIFCwNd0M4k7PkGCKNXhbaM=
 github.com/sagernet/sing-shadowtls v0.2.1/go.mod h1:sWqKnGlMipCHaGsw1sTTlimyUpgzP4WP3pjhCsYt9oA=
-github.com/sagernet/sing-snell v0.0.0-20260709045721-90e5a65e1f85 h1:atDGE+F2EQxM82YCACqi/zVD7HIxPZkI4ZHFNNY4SJc=
-github.com/sagernet/sing-snell v0.0.0-20260709045721-90e5a65e1f85/go.mod h1:PcwzX/Xvqky0EP3kGt8OCjYb3R1pydenPHNQZcPZmXY=
+github.com/sagernet/sing-snell v0.0.0-20260710053050-c537637554f3 h1:P6YUz4qs20lq55Rj+I1zH7d/RZOlqQQ0Ui9Gfr5xDiQ=
+github.com/sagernet/sing-snell v0.0.0-20260710053050-c537637554f3/go.mod h1:PcwzX/Xvqky0EP3kGt8OCjYb3R1pydenPHNQZcPZmXY=
 github.com/sagernet/sing-tun v0.8.12-0.20260710042924-375e9ae639c5 h1:kL9E3UR9BRTH3ESiI519idZ2FZtObbFs8vlLwfJCt/g=
 github.com/sagernet/sing-tun v0.8.12-0.20260710042924-375e9ae639c5/go.mod h1:QvarqUtHfj1ULaRR+6kZOS/OoCE+pYGq67A5tyIy+dQ=
 github.com/sagernet/sing-usbip v0.0.0-20260616101517-efb91521eddb h1:KEMbfexD4DvrQGYWwx6r+AwH9Veh8z6cnBZmtCS2G+0=