feat(html): Reduce bot pricing

bc/web/templates/big-cases/sponsors.html

@@ -7,7 +7,7 @@
   <p class="lead">
     The Big Cases Bot provides updates about historical cases to a growing audience of more than 55,000 attorneys, journalists, and court watchers.
   </p>
-  <p>Bot sponsorships are offered on an exclusive monthly basis for the price of <strong>$2,500</strong>.</p>
+  <p>Bot sponsorships are offered on an exclusive monthly basis for the price of <strong>$1,750</strong>.</p>
   <p>When you sponsor the Bot, you get the following benefits:</p>
   <ul>
     <li><p>Your name will be added as a sponsor to the Bot's profile on all social media platforms where the bot is available.</p></li>