about: link to the original write up on nostr protocol

updates nostr/nostrweb#3

README.md

@@ -1,6 +1,6 @@
 # nostr web client
 
-this is a web interface to [nostr](https://nostr.info/).
+this is a web interface to [nostr](https://github.com/nostr-protocol/nostr#readme).
 a live instance is hosted at https://nostr.ch/
 
 some useful resources:

src/about.html

@@ -17,7 +17,7 @@
       </p>
       <p>
         for more information about nostr protocol, check out
-        <a href="https://nostr.info/" target="_blank" rel="noopener noreferrer">nostr.info</a>.
+        <a href="https://github.com/nostr-protocol/nostr#readme" target="_blank" rel="noopener noreferrer">github.com/nostr-protocol/nostr#readme</a>.
       </p>
       back to <a href="/">nostr.ch</a>
     </main>