doc: fix waitinvoice update.

Waitinvoice also returns once an invoice is expired.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

doc/lightning-waitinvoice.7

@@ -13,7 +13,7 @@ then returns that single entry as per \fBlistinvoice\fR\.
 .SH RETURN VALUE
 
 On success, an invoice description will be returned as per
-\fBlightning-listinvoice\fR(7)\. The \fIstatus\fR field will be \fIpaid\fR\.
+\fBlightning-listinvoice\fR(7)\. The \fIstatus\fR field will be \fIpaid\fR or \fIexpired\fR\.
 
 
 On error the returned object will contain \fBcode\fR and \fBmessage\fR properties,
@@ -42,4 +42,4 @@ responsible\.
 
 Main web site: \fIhttps://github.com/ElementsProject/lightning\fR
 
-\" SHA256STAMP:dc08283c1e264fc636c02a1a1b018ebd628b983a19ae861025c5db32e36a985a
+\" SHA256STAMP:afa7ad33136d9bd9a92b9e0c52387c3124f009ca11b045dbac4e840aaa610857

doc/lightning-waitinvoice.7.md

@@ -16,7 +16,7 @@ RETURN VALUE
 ------------
 
 On success, an invoice description will be returned as per
-lightning-listinvoice(7). The *status* field will be *paid*.
+lightning-listinvoice(7). The *status* field will be *paid* or *expired*.
 
 On error the returned object will contain `code` and `message` properties,
 with `code` being one of the following: