fix(nix): update vendorHash and vendor dir for new deps

vendor/github.com/bytedance/sonic/internal/rt/map_go126.go

@@ -0,0 +1,15 @@
+//go:build go1.26 || goexperiment.swissmap
+// +build go1.26 goexperiment.swissmap
+
+package rt
+
+import (
+	"unsafe"
+)
+
+type GoMapIterator struct {
+	K     unsafe.Pointer
+	V     unsafe.Pointer
+	T     *GoMapType
+	It    unsafe.Pointer
+}