Description of the change

Relax the version requirement of google-ai-generativelanguage, this is to improve the interoperability with other libraries such as langchain-google-genai

Motivation

Spotted in langchain-ai/langchain-google#956, the hard coded version would make code that utilizes libraries requiring newer version google-ai-generativelanguage stops working.

Type of change

Choose one: Feature request

Checklist

• I have performed a self-review of my code.
• I have added detailed comments to my code where applicable.
• I have verified that my change does not break existing code.
• My PR is based on the latest changes of the main branch (if unsure, please run git pull --rebase upstream main).
• I am familiar with the Google Style Guide for the language I have coded in.
• I have read through the Contributing Guide and signed the Contributor License Agreement.