[nspcc-dev#266] nns: Fix typo in the method description

Signed-off-by: Anna Shaleva <[email protected]>

nns/nns_contract.go

@@ -440,7 +440,7 @@ func DeleteRecords(name string, typ RecordType) {
 	updateSoaSerial(ctx, tokenID)
 }
 
-// Resolve resolves given name (not more then three redirects are allowed).
+// Resolve resolves given name (not more than three redirects are allowed).
 func Resolve(name string, typ RecordType) []string {
 	ctx := storage.GetReadOnlyContext()
 	res := []string{}