Fix reversed blog navigation links

Swap prevRoute and nextRoute for blog posts to fix navigation
direction. Blog posts are ordered newest to oldest, so the
traversal order is reversed from chronological order.

- Previous link now correctly points to older posts
- Next link now correctly points to newer posts

This only affects blog posts, other sections remain unchanged.

Fixes #7844

Author: kanikaa88

src/components/Layout/Page.tsx

@@ -96,8 +96,8 @@ export function Page({
           {!isBlogIndex && (
             <DocsPageFooter
               route={route}
-              nextRoute={nextRoute}
-              prevRoute={prevRoute}
+              nextRoute={section === 'blog' ? prevRoute : nextRoute}
+              prevRoute={section === 'blog' ? nextRoute : prevRoute}
             />
           )}
         </div>