Update content/stellar-contracts/accounts/authorization-flow.mdx

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: brozorec

content/stellar-contracts/accounts/authorization-flow.mdx

@@ -164,7 +164,7 @@ ContextRule {
 2. Evaluate Rule 1: Both Alice and Bob authenticated, no policies to enforce → Success
 3. Result: Authorized
 
-The expired session rule is automatically filtered out, and authorization falls back to the default admin rule.
+The client ignores the expired session rule and explicitly selects the default admin rule (ID 1) in `context_rule_ids`.
 
 ### Authorization Failure