added source+license link to index

call/templates/call/index.html

@@ -106,6 +106,7 @@
       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>
+    <p><a href="https://git.xpub.nl/murtaugh/call2025">Sources for this call are available</a> and released under a <a href="https://artlibre.org/licence/lal/en/">Free Art License</a>.</p>
   </div>