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.

tmp/year_prize.csv

@@ -164,7 +164,7 @@
 2001_schweikh,Best one-liner
 2001_westley,Best position-independent code
 2001_williams,Best Graphic Game
-2004_anonymous,"Best use of ""Precious"" Lines"
+2004_anonymous,Best use of 'Precious' Lines
 2004_arachnid,Best use of Vision
 2004_burley,Best Calculated Risk
 2004_gavare,Best Use of Light and Spheres