Updates based on review comments (#49)

This updates the ZSA ZIPs based on the comments made on PR#680.

zip-0226.html

@@ -104,7 +104,7 @@
                         <span class="math">\(\mathsf{AssetBase} : \mathbb{P}^*\)</span>
                      is the unique element of the Pallas group <a id="footnote-reference-22" class="footnote_reference" href="#protocol-pallasandvesta">22</a> that identifies each Asset in the Orchard protocol, defined as the Asset Base in ZIP 227 <a id="footnote-reference-23" class="footnote_reference" href="#zip-0227">6</a>, a valid group element that is not the identity and is not
                         <span class="math">\(\bot\)</span>
-                    . The byte representation of the Asset Base is defined as
+                    . The byte encoding of the Asset Base is defined as
                         <span class="math">\(\mathsf{asset\_base} : \mathbb{B}^{[\ell_{\mathbb{P}}]} := \mathsf{repr}_{\mathbb{P}}(\mathsf{AssetBase})\)</span>
                     .</li>
                 </ul>

zip-0226.rst

@@ -90,7 +90,7 @@ Let :math:`\mathsf{Note^{OrchardZSA}}` be the type of a ZSA note, i.e.
 An Orchard ZSA note differs from an Orchard note [#protocol-notes]_ by additionally including the Asset Base, :math:`\mathsf{AssetBase}`. So a ZSA note is a tuple :math:`(\mathsf{g_d, pk_d, v, \rho, \psi, \mathsf{AssetBase}})`,
 where
 
-- :math:`\mathsf{AssetBase} : \mathbb{P}^*` is the unique element of the Pallas group [#protocol-pallasandvesta]_ that identifies each Asset in the Orchard protocol, defined as the Asset Base in ZIP 227 [#zip-0227]_, a valid group element that is not the identity and is not :math:`\bot`. The byte representation of the Asset Base is defined as :math:`\mathsf{asset\_base} : \mathbb{B}^{[\ell_{\mathbb{P}}]} := \mathsf{repr}_{\mathbb{P}}(\mathsf{AssetBase})`.
+- :math:`\mathsf{AssetBase} : \mathbb{P}^*` is the unique element of the Pallas group [#protocol-pallasandvesta]_ that identifies each Asset in the Orchard protocol, defined as the Asset Base in ZIP 227 [#zip-0227]_, a valid group element that is not the identity and is not :math:`\bot`. The byte encoding of the Asset Base is defined as :math:`\mathsf{asset\_base} : \mathbb{B}^{[\ell_{\mathbb{P}}]} := \mathsf{repr}_{\mathbb{P}}(\mathsf{AssetBase})`.
 
 Note that the above assumes a canonical encoding, which is true for the Pallas group, but may not hold for future shielded protocols.