Update Google Analytics Support Documentation in README.md

[saksham1991999]

Changes

Changed the previous link to a better-explained Article for Google Analytics Support using Measurement ID.

How Has This Been Tested?

Mentions

Types of changes

• [ ] Breaking change (fix or feature that would cause existing functionality to change)
• [ ] New feature and improvements (non-breaking change which adds/improves functionality)
• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] Code Refactoring (internal change which is not user facing)
• [x] Documentation
• [ ] Test, CI, or build

Checklist

• [x] Coding style of this project is followed
• [ ] Change in documentation is required
• [x] Documentation has been updated accordingly
• [ ] Unit tests have been added to cover code change