doc: Deprecation reason of settled on Invoice

This documents how to deal with `settled` being deprecated. It took me quite a bit of digging without such documentation. [skip ci]
2022-08-02 11:04:01 +02:00
1 parent f7b7442680
commit b4647bc37f
@@ -3227,7 +3227,11 @@ message Invoice {
    */
    int64 value_msat = 23;

-    // Whether this invoice has been fulfilled
+    /*
+    Whether this invoice has been fulfilled
+
+    The field is deprecated. Use the state field instead (compare to SETTLED).
+    */
    bool settled = 6 [deprecated = true];

    /*