chore(main): release 0.3.18 (#567)

🤖 I have created a release *beep* *boop*
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##
[0.3.18](v0.3.17...v0.3.18)
(2025-11-24)


### Bug Fixes

* return updated `agent_card` in `JsonRpcTransport.get_card()`
([#552](#552))
([0ce239e](0ce239e))

---
This PR was generated with [Release
Please](https://github.com/googleapis/release-please). See
[documentation](https://github.com/googleapis/release-please#release-please).

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)