commit id '40cb5581' caused syntax-check error:

prohibit_empty_lines_at_EOF
docs/manifest.json
maint.mk: empty line(s) or no newline at EOF
maint.mk:929: recipe for target 'sc_prohibit_empty_lines_at_EOF' failed
make: *** [sc_prohibit_empty_lines_at_EOF] Error 1

I just edited the file and replaced the closing } and it made things happy

Use of the relation "shortcut" for a favicon was an Internet
Explorer only feature. Other browsers just require "icon".

The new icons & metadata are generated using

  https://realfavicongenerator.net/

which is user tested to work well across all modern clients
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>