Add short explanation of the two versions of Hirukowashi

Author: drojf

httpGUI/installer.html

@@ -276,6 +276,14 @@ <H3>This message will be removed once more people have tested the mod.</H3>
 															<li><strong>NOT AVAILABLE:</strong> Mangagamer Sprites</li>
 															<li><strong>NOT AVAILABLE:</strong> OG Sprites and Backgrounds</li>
 														</ul>
+														<br>
+														<strong>Why two versions of Hirukowashi? Which one should I read?</strong><br>
+														Hirukowashi had changes in the Console version which are difficult to combine with the PC version.<br>
+														Due to this, we made two versions of Hirukowashi:
+														<ul class="installer-bullets">
+															<li>An unvoiced PC version.</li>
+															<li>A full port of the Console version.</li>
+														</ul>
 													</div>
 													<div v-else>
 														<div v-if="selectedSubMod.modName === 'Console Arcs'">