Update to version v6.0.2

[michaelin-96]

[6.0.2] - 2024-07-22

Added

• Added a migration documentation for Migrating QnABot configurations and data from existing deployment to new deployment
• Added a documentation for Bedrock Knowledge Base

Fixed

• Improve logout functionality which signs out the user and invalidates the access and refresh tokens that Amazon Cognito issued to a user. Issue #747
• Fixed bug that restricted import of questions with answers that consisted of only double-byte characters. Issue #731
• Fixed bug with chained questions causing errors in the fulfillment lambda.

Updated

• Removed aws-sdk (JavaScript V2) from dependency list.
• Updated parameter description for elicit response bot settings in the content designer settings. Issue #745
• Removed LLM models meta.llama2-70b-chat-v1 and meta.llama2-13b-chat-v1 from the list of models in the Cloudformation parameter LLMBedrockModelId since these models will be unavailable on Amazon Bedrock starting from August 12, 2024.
• Updated the setting LLM_QA_NO_HITS_REGEX in the Content Designer to include a default pattern Sorry, I don't know in prompts specified through the setting LLM_QA_PROMPT_TEMPLATE and other patterns returned by LLMs in their responses.
• Constrainted the query made to Bedrock Knowledge Base to maximum of 1000 characters input query as per the input requirements.