Add recursion depth guard during decode in encoding/xml

{
                    "vendor": "Go standard library",
                    "product": "encoding/xml",
                    "collectionURL": "https://pkg.go.dev",
                    "packageName": "encoding/xml",
                    "versions": [
                        {
                            "version": "0",
                            "lessThan": "1.25.13",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "1.26.0-0",
                            "lessThan": "1.26.6",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "1.27.0-0",
                            "lessThan": "1.27.0-rc.3",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ],
                    "programRoutines": [
                        {
                            "name": "Decoder.push"
                        },
                        {
                            "name": "Decoder.pop"
                        },
                        {
                            "name": "Decoder.RawToken"
                        },
                        {
                            "name": "Decoder.unmarshalPath"
                        },
                        {
                            "name": "Decoder.unmarshal"
                        },
                        {
                            "name": "Decoder.Decode"
                        },
                        {
                            "name": "Decoder.DecodeElement"
                        },
                        {
                            "name": "Decoder.Skip"
                        },
                        {
                            "name": "Decoder.Token"
                        },
                        {
                            "name": "Unmarshal"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }