doc: update supported methods

README.md

@@ -123,7 +123,7 @@ You can also contribute to our [bounty program](https://github.com/getAlby/light
 
 ✅ NIP-47 info event
 
-❌ `expires` tag in requests
+❌ `expiration` tag in requests
 
 ### LND
 
@@ -132,6 +132,7 @@ You can also contribute to our [bounty program](https://github.com/getAlby/light
 ✅ `get_balance`
 
 ✅ `pay_invoice`
+- ⚠️ amount not supported (for amountless invoices)
 
 ✅ `pay_keysend`
 
@@ -159,6 +160,7 @@ You can also contribute to our [bounty program](https://github.com/getAlby/light
 ✅ `get_balance`
 
 ✅ `pay_invoice`
+- ⚠️ amount not supported (for amountless invoices)
 
 ✅ `pay_keysend`
 - ⚠️ preimage in request not supported