[py] Update docs with pytest example and minor formatting fixes

[cgoldberg]

💥 What does this PR do?

Edits to index.rst in docs to add a pytest example and fix some minor issues

🔄 Types of changes

• Cleanup (formatting, renaming)

[qodo-code-review]

Review Summary by Qodo

Update Python docs with pytest example and URL/formatting fixes

📝 Documentation

Walkthroughs

Description

• Update documentation URLs to remove 'www' subdomain
• Add pytest framework example alongside unittest
• Standardize quote style from single to double quotes
• Minor text improvements and formatting fixes

File Changes

1. py/docs/source/index.rst 📝 Documentation +40/-20

Documentation updates with pytest example and formatting

• Removed 'www' subdomain from 4 documentation URLs for consistency
• Added new Example 3 demonstrating pytest framework with fixture pattern
• Changed Example 2 from Google/Firefox to Selenium/Chrome with updated assertions
• Standardized all code examples to use double quotes instead of single quotes
• Fixed minor text issues: "simple example" to "an example", "library" to "framework"
• Corrected capitalization: "Webdriver" to "WebDriver"
• Fixed section header underline length for "Selenium Grid" section

py/docs/source/index.rst

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