Add rel="prev" and rel="next" attributes to the previous and next pagination links

We should add rel="prev" and rel="next" attributes to pagination links to improve SEO and accessibility by helping search engines and assistive technologies understand the relationship between pages.

• Add rel="prev" attribute to previous page links
• Add rel="next" attribute to next page links

REF:

• https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Attributes/rel#prev
• https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Attributes/rel#next