Adding YAML syntax highlighting to README.md
Adding YAML syntax highlighting to README.md

Previously, there was no syntax highlighting for the example log under
"log format". Now it has pretty colors.

Signed-off-by: Matt Langbehn <be4a68432fbbc874fc2f26c6bc5da2cd4d88fc13@gmail.com>

mlangbehn/finglonger,nibalizer/finglonger