Tweak web index page wording

Mostly this is just to bump the GitHub runner, which didn't appear to
pick up the last change to update the GitHub pages.

index.html

@@ -26,8 +26,8 @@ <h1 class="title">Ray Tracing in One Weekend<br>—<br>The Book Series</h1>
 
   <h1 id='books'>Getting the Books</h1>
 
-  <p>The <cite>Ray Tracing in One Weekend</cite> series of books are now available to the public for free online. They
-  are now released under <a href="https://github.com/RayTracing/raytracing.github.io/blob/release/COPYING.txt">the CC0
+  <p>The <cite>Ray Tracing in One Weekend</cite> series of books are available to the public for free online. They are
+  released under <a href="https://github.com/RayTracing/raytracing.github.io/blob/release/COPYING.txt">the CC0
   license</a>. This means that they are as close to public domain as we can get. (While that also frees you from the
   requirement of providing attribution, it would help the overall project if you could point back to this web site as a
   service to other users.)