fix: update sso documentation (#379)

Author: JackHamer09

content/00.zksync-era/30.unique-features/30.zksync-sso/23.sessions.md

@@ -191,8 +191,7 @@ type ConstraintCondition =
 
 ## Paymasters
 
-General paymasters are supported with sessions.
-Approval-based paymasters are not yet supported.
+Paymasters can be used to pay for the session transaction fees.
 
 ```ts
 const transactionHash = await writeContract(wagmiConfig, {

content/00.zksync-era/30.unique-features/30.zksync-sso/5.getting-started.md

@@ -86,6 +86,14 @@ Just 2 steps:
           }),
         ],
       },
+      // Optional: Receive notifications about session state changes
+      onSessionStateChange: ({ state, address, chainId }) => {
+        console.log(`Session state for address ${address} changed: ${state.type} - ${state.message}`);
+
+        // Use this to notify users and restart the session if needed
+        // - Session expired: state.type === 'session_expired'
+        // - Session inactive (e.g. was revoked): state.type === 'session_inactive'
+      },
     });
 
     const wagmiConfig = createConfig({
@@ -149,6 +157,15 @@ Just 2 steps:
           }),
         ],
       },
+
+      // Optional: Receive notifications about session state changes
+      onSessionStateChange: ({ state, address, chainId }) => {
+        console.log(`Session state for address ${address} changed: ${state.type} - ${state.message}`);
+
+        // Use this to notify users and restart the session if needed
+        // - Session expired: state.type === 'session_expired'
+        // - Session inactive (e.g. was revoked): state.type === 'session_inactive'
+      },
     });
 
     const wagmiConfig = defaultWagmiConfig({