Fix Nu Html Checker warnings and errors

[ghost]

• Remove type=text/javascript
• Change duplicate IDs to classes
• Add blank alt text to SVG social icons
• Change section to div
• Remove trailing slashes from link, img
• Change article to div

This fixes the warnings and errors from https://validator.w3.org/nu/?doc=https%3A%2F%2Fgokarna-hugo.netlify.app%2F and https://validator.w3.org/nu/?doc=https%3A%2F%2Fgokarna-hugo.netlify.app%2Fposts

The deploy preview contains no errors or warnings: https://validator.w3.org/nu/?doc=https%3A%2F%2Fdeploy-preview-218--gokarna-hugo.netlify.app and https://validator.w3.org/nu/?doc=https%3A%2F%2Fdeploy-preview-218--gokarna-hugo.netlify.app%2Fposts

[netlify[bot]]

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[ghost]

@526avijitgupta Could you please review this PR?

[526avijitgupta]

Good job @Ta180m , thanks for fixing!

[ghost]

Thanks!

Are we still waiting on something or could this PR be merged?