fix: fix a bug for escaping 0xE2 0x80 0xA8 in compactString

[lizixing]

the code below will panic

	v := struct {
		Type  string          `json:"type"`
		Value json.RawMessage `json:"value"`
	}{
		Type:  "pure",
		Value: json.RawMessage{0x22, 0x2e, 0xe2, 0x80, 0xa8, 0x22},
	}
	b, err := json.Marshal(&v)
	fmt.Printf("b: %s, err: %v\n", string(b), err)

[alexey-slivkin]

this PR should also fix the bug from #507

[goccy]

Thank you for your great PR ! LGTM 👍