Bump version from 0.6.0 to 0.6.1

Fix ChannelServiceAdapter.create_conversation implementation (#233)

* Beginning for channel adapter unit tests

* Adjusting create_connector_client to not necessitate context

* Sketch of RestChannelServiceClientFactory test

* Adding create_connector_client tests for non agentic scenarios

* Another commit

* TestChannelServiceAdapter outline

* First pass at create_conversation unit test

* adding more assertions to test

* Formatting

* Adding create_connector_client calls that use agentic identity

* Small change to error message

Update release notes and README links to point to the new changelog.m…

…d for version 0.5.0 (#197)