http -> https for z.cash link

Author: imichaelmiers

index.html

@@ -82,7 +82,7 @@ <h1>
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- Zerocash, the protocol that succeeded Zerocoin, is being developed into a full-fledged digital currency, <a style="font-weight: bold;" href="http://z.cash/">Zcash</a>.
+ Zerocash, the protocol that succeeded Zerocoin, is being developed into a full-fledged digital currency, <a style="font-weight: bold;" href="https://z.cash/">Zcash</a>.
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       <h3 id="what-is-zerocoin">What is Zerocoin?</h3>
 <p>Zerocoin is a project to fix a major weakness in Bitcoin: the lack of privacy guarantees we take for granted in using credit cards and cash. Our goal is to build a cryptocurrency where your neighbors, friends and enemies can&rsquo;t see what you bought or for how much.</p>