Update urn-solid links to canonical urn-solid.com domain (#1)

urn-solid now serves from urn-solid.com (custom domain via CNAME on the
gh-pages branch). The .github.io URL still 301-redirects, so this is a
display/canonical-link tidy, not a fix for breakage.

Author: melvincarvalho

README.md

@@ -1,6 +1,6 @@
 # solid-apps
 
-Working LOSOS applications built on the [LION](https://linkedobjects.org/) + [urn-solid](https://urn-solid.github.io/) + [solid-schema](https://solid-schema.github.io/) + [solid-panes](https://solid-panes.github.io/) + [LOSOS](https://losos.org/) stack.
+Working LOSOS applications built on the [LION](https://linkedobjects.org/) + [urn-solid](https://urn-solid.com/) + [solid-schema](https://solid-schema.github.io/) + [solid-panes](https://solid-panes.github.io/) + [LOSOS](https://losos.org/) stack.
 
 Each app is a single-HTML-file application that handles one or more `urn:solid:` types. Open the URL to use it.
 

index.html

@@ -22,7 +22,7 @@
   <a href="/">solid-apps</a>
   <a href="/index.json">catalog</a>
   <a href="/reverse-index.json">by type</a>
-  <a href="https://urn-solid.github.io/">urn-solid</a>
+  <a href="https://urn-solid.com/">urn-solid</a>
   <a href="https://solid-schema.github.io/">solid-schema</a>
   <a href="https://solid-panes.github.io/">solid-panes</a>
 </header>