Update pay_for_offer docs about unsupported chains

diff --git a/lightning/src/ln/channelmanager.rs b/lightning/src/ln/channelmanager.rs
index 8dfd0c8fcaa32538de27b5f255a8b013e3939e26..02aa5efcd8153359a36e42382c8f1a2e9c165106 100644 (file)
--- a/lightning/src/ln/channelmanager.rs
+++ b/lightning/src/ln/channelmanager.rs
@@ -7830,6 +7830,7 @@ where
        /// Errors if:
        /// - a duplicate `payment_id` is provided given the caveats in the aforementioned link,
        /// - the provided parameters are invalid for the offer,
+       /// - the offer is for an unsupported chain, or
        /// - the parameterized [`Router`] is unable to create a blinded reply path for the invoice
        ///   request.
        ///