Docs: Fix screenshot file name

The asciidoc is looking for "My_Lists_dd.png", but the file has a
capitalized extension ".PNG". This commit renames the file to match the
code, since lowercase is our common naming convention.

Signed-off-by: Remington Steed <rjs7@calvin.edu>

diff --git a/docs/media/My_Lists_dd.PNG b/docs/media/My_Lists_dd.PNG
deleted file mode 100644 (file)
index 9f41ad5..0000000
Binary files a/docs/media/My_Lists_dd.PNG and /dev/null differ

diff --git a/docs/media/My_Lists_dd.png b/docs/media/My_Lists_dd.png
new file mode 100644 (file)
index 0000000..9f41ad5
Binary files /dev/null and b/docs/media/My_Lists_dd.png differ