improve use of One_Ring_inscription in 2004/anonymous

Use the `ring.pgm` image output, scaled to a height of 127
pixels and translated into PNG format.

Also fix the `tmp/year_prize.numbers` file to
change the award for the `2004_anonymous` entry
to use single quotes so that `tmp/gen_entry_json.sh`
won't re-introduce the double quotes into the
`2004/anonymous/.entry.json` file.

Ran `bin/readme2index.sh -v 1 2004/anonymous` to perform the above.

2004/anonymous/README.md

@@ -74,14 +74,14 @@ Speech](https://www.glyphweb.com/arda/b/blackspeech.html):
 
 <img src="One_Ring_inscription.png"
  alt="The inscription, in the Black Speech of Mordor, on the One Ring"
- width=453 height=127>
+ width=690 height=127>
 
 into English reads:
 
 ```
-    **One Ring** to rule them all,
-    **One Ring** to find them,
-    **One Ring** to bring them all and in the darkness bind them.
+    One Ring to rule them all,
+    One Ring to find them,
+    One Ring to bring them all and in the darkness bind them.
 ```