gst-inspect: Avoid use of non-bright blue color

Simple blue doesn't work on Linux console, which also happens to be a
gnome-terminal theme. Use bright-blue instead.
3 jobs for inspect-rm-blue in 5 minutes and 26 seconds (queued for 1 second)
Status Job ID Name Coverage
  Preparation
passed #52383
manifest

00:00:22

 
  Build
passed #52384
build fedora x86_64

00:02:52

 
  Full Builds
passed #52385
build android arm64 api28

00:02:12