chore: fix deprecation

modules/markup/markdown/util/text.go

@@ -0,0 +1,26 @@
+// Copyright 2024 The Forgejo Authors. All rights reserved.
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+package util
+
+import (
+	"bytes"
+
+	"github.com/yuin/goldmark/ast"
+)
+
+func textOfChildren(n ast.Node, src []byte, b *bytes.Buffer) {
+	for c := n.FirstChild(); c != nil; c = c.NextSibling() {
+		if t, ok := c.(*ast.Text); ok {
+			b.Write(t.Value(src))
+		} else {
+			textOfChildren(c, src, b)
+		}
+	}
+}
+
+func Text(n ast.Node, src []byte) []byte {
+	var b bytes.Buffer
+	textOfChildren(n, src, &b)
+	return b.Bytes()
+}