added source+license link to index

call/templates/call/index.html

@@ -102,7 +102,7 @@
   <div id="colofon">
     <p>
       The heart of this webpage is the <a href="https://0x72.itch.io/2bitcharactergenerator" target="extern">2bitcharactergenerator</a>, by <a href="https://0x72.itch.io/" target="extern">0x72</a>,
-      found via Everest Pipkin's great <a href="https://tinytools.directory/" target="extern">tinytools.directory</a> and generously released via a CC0 (public domain) license.
+      found via Everest Pipkin's great <a href="https://tinytools.directory/" target="extern">tinytools.directory</a> and generously released under a CC0 (public domain) license.
       The generative text is inspired by early experiments with computer and poetry such as <a href="https://elmcip.net/creative-work/house-dust" target="extern">Allison Knowles' House of Dust</a>.
       As a program XPUB believes in creative expression as <em>not from scratch</em>, and like language, shared and in conversation with all that has come before.
     </p>