fix: kotlinx.serialization.MissingFieldException: Field 'locked' is r…

…equired for type with serial name 'io.github.magonxesp.cloudflareddns.DNSRecord', but it was missing at path: $.result[0]

src/main/kotlin/io/github/magonxesp/cloudflareddns/clients/cloudflare/CloudflareDNSRecords.kt

@@ -21,7 +21,7 @@ data class DNSRecord(
     @SerialName("created_on")
     val createdOn: String,
     val id: String,
-    val locked: Boolean,
+    val locked: Boolean? = null,
     @SerialName("modified_on")
     val modifiedOn: String,
     val proxiable: Boolean,