Add Shamir's Secret Sharing notes, update templates

public/kzg-commitments.html

@@ -147,6 +147,9 @@ $$</p>
 
 <p>As a final note, in order to try to digest the notes, I&rsquo;ve did a <em>toy implementation</em> of this scheme at <a href="https://github.com/arnaucube/kzg-commitments-study">https://github.com/arnaucube/kzg-commitments-study</a>. It&rsquo;s quite simple, but contains the logic overviewed in this notes.</p>
 
+<p><br>
+- <a href="https://arnaucube.com/blog/kzg-batch-proof.html">Part 2: Batch proof in KZG Commitments</a></p>
+
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@@ -218,6 +221,22 @@ $$</p>
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