Fix tar.bz2 snapshot example

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

cgitrc.5.txt

@@ -288,8 +288,8 @@ root-desc=tracking the foobar development
 root-readme=/var/www/htdocs/about.html
 
 
-# Allow download of tar.gz, tar.bz and zip-files
-snapshots=tar.gz tar.bz zip
+# Allow download of tar.gz, tar.bz2 and zip-files
+snapshots=tar.gz tar.bz2 zip
 
 
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