previews: Update 'repochanges' screenshot
previews: Update 'repochanges' screenshot

Change-Id: I0a6e6ca64117f861e192494d685c9b2b2f363c71
Signed-off-by: Adrian DC <01fb3892f39957945220431e7409156544d2f041@gmail.com>

AdrianDC/android_development_shell_tools,AdrianDC/android_development_shell_tools