Fix a couple of typos

Author: davorg

in/index.tt

@@ -2,7 +2,7 @@
 
 <p>Welcome to the Proposed Perl Changes web site.</p>
 
-<p>Download this data as <a href="./ppcs.json">JSON</a></p>
+<p>Download this data as <a href="./ppcs.json">JSON</a>.</p>
 <table class="table" id="datatable">
   <thead>
     <tr>

ttlib/page.tt

@@ -94,7 +94,7 @@
 <footer class="footer mt-auto py-3 bg-light">
   <div class="container">
     <span class="text-muted">Made by <a href="https://links.davecross.co.uk/">Dave Cross</a> / 
-      Code on <a href="https://github.com/Perl/PPCs">Github</a></span>
+      Code on <a href="https://github.com/Perl/PPCs">GitHub</a></span>
   </div>
 </footer>