feat: updated march sitemap and script for automation - ✅

[amaan-bhati]

Description

• Added the updated sitemap for the blog website, verified it with a few latest blog urls:
  • https://keploy.io/blog/community/top-test-automation-frameworks
  • https://keploy.io/blog/community/building-reliable-ai-writing-tools-lessons-from-developing-textero
  • https://keploy.io/blog/community/security-testing-guide
  • https://keploy.io/blog/community/software-testing-strategies

Changes

• Updated the sitemap with new urls, updated lastmod

Type of Change

• Chore (maintenance, refactoring, tooling updates)
• Bug fix (non-breaking change that fixes an issue)
• New feature (change that adds functionality)
• Breaking Change (may require updates in existing code)
• UI improvement (visual or design changes)
• Performance improvement (optimization or efficiency enhancements)
• Documentation update (changes to README, guides, etc.)
• CI (updates to continuous integration workflows)
• Revert (undo a previous commit or merge)

Testing

• Ran npm run build, nothing breaks
• Tested the new sitemap with the latest published blog urls

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have made corresponding changes to the documentation
• I have added corresponding tests
• I have run the build command to ensure there are no build errors
• My changes have been tested across relevant browsers/devices
• For UI changes, I've included visual evidence of my changes

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