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

vendor/github.com/cloudwego/base64x/base64x_subr_amd64.go

@@ -0,0 +1,18 @@
+
+
+package base64x
+
+import (
+	"github.com/cloudwego/base64x/internal/native"
+)
+
+// HACK: maintain these only to prevent breakchange, because sonic-go linkname these
+var (
+	_subr__b64decode uintptr
+	_subr__b64encode uintptr
+)
+
+func init() {
+	_subr__b64decode = native.S_b64decode
+	_subr__b64encode = native.S_b64encode
+}