Update README.md with Google Calendar MCP

[v-3]

Integration with google calendar to check schedule, find time and add / remove events

Server Details

• Server: Google Calendar

Motivation and Context

Allow Claude to integrate with Google Calendar and use it to check schedule and create meetings

How Has This Been Tested?

Ran multiple tests on my personal claude account

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation update

Checklist

• I have read the MCP Protocol Documentation
• My changes follows MCP security best practices
• I have updated the server's README accordingly
• I have tested this with an LLM client
• My code follows the repository's style guidelines
• New and existing tests pass locally
• I have added appropriate error handling
• I have documented all environment variables and configuration options