docs(blog): put alt text to all images

[DoguhanOzgurAkca]

PR Checklist

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Bugs / Features

• Related issue(s) linked
• Tests for the changes have been added
• Docs have been added / updated
• Changesets have been added https://refine.dev/docs/guides-concepts/contributing/#creating-a-changeset

What is the current behavior?

What is the new behavior?

docs(blog): put alt text to all images

Notes for reviewers

[changeset-bot]

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