chore(main): release 0.3.18

Author: a2a-bot

CHANGELOG.md

@@ -1,5 +1,12 @@
 # Changelog
 
+## [0.3.18](https://github.com/a2aproject/a2a-python/compare/v0.3.17...v0.3.18) (2025-11-24)
+
+
+### Bug Fixes
+
+* return updated `agent_card` in `JsonRpcTransport.get_card()` ([#552](https://github.com/a2aproject/a2a-python/issues/552)) ([0ce239e](https://github.com/a2aproject/a2a-python/commit/0ce239e98f67ccbf154f2edcdbcee43f3b080ead))
+
 ## [0.3.17](https://github.com/a2aproject/a2a-python/compare/v0.3.16...v0.3.17) (2025-11-24)