Fix XMPP from-address config not being used

spec/requests/webhooks_spec.rb

@@ -68,6 +68,7 @@ RSpec.describe "Webhooks", type: :request do
 
       context "notification preference set to 'xmpp'" do
         before do
+          Setting.xmpp_notifications_from_address = "botka@kosmos.org"
           user.update! preferences: { lightning_notify_sats_received: "xmpp" }
           post "/webhooks/lndhub", params: payload.to_json
         end
@@ -78,7 +79,7 @@ RSpec.describe "Webhooks", type: :request do
 
           msg = enqueued_jobs.first["arguments"].first
           expect(msg["type"]).to eq("normal")
-          expect(msg["from"]).to eq("kosmos.org")
+          expect(msg["from"]).to eq("botka@kosmos.org")
           expect(msg["to"]).to eq(user.address)
           expect(msg["subject"]).to eq("Sats received!")
           expect(msg["body"]).to match(/^12,300 sats received/)