Add download link to the offline version for 1.0.0

Author: SheepTester

index.html

@@ -131,7 +131,12 @@ <h2 id="updates">Update history</h2>
         See the code and previous versions on
         <a href="https://github.com/SheepTester/htmlifier/">Github</a>.
       </p>
-      <h3>2021-08-08</h3>
+      <h3>
+        2021-08-08 (<a
+          href="https://github.com/SheepTester/htmlifier/releases/download/v1.0.0/htmlifier-offline.html"
+          >download</a
+        >)
+      </h3>
       <ul>
         <li>
           To support the use of the HTMLifier in