Update post.js

Author: gragland

src/templates/post.js

@@ -43,7 +43,7 @@ export const PostTemplate = ({ content, frontmatter, slug, permalink }) => {
       {(permalink === true || extraLinks.length > 0) && (
         <Links>
           <div className="links-title">
-            <span role="img" aria-label="party">
+            <span role="img" aria-label="books">
               📚
             </span>
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