.gitlab-ci.yml: update after adding raspberrypi3_qt5we_defconfig

Commit 21234ce8 introduced raspberrypi3_qt5we_defconfig but didn't
update .gitlab-ci.yml. Do that now.

Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

.gitlab-ci.yml

@@ -190,6 +190,7 @@ raspberrypi0_defconfig: *defconfig
 raspberrypi2_defconfig: *defconfig
 raspberrypi3_64_defconfig: *defconfig
 raspberrypi3_defconfig: *defconfig
+raspberrypi3_qt5we_defconfig: *defconfig
 raspberrypi_defconfig: *defconfig
 riotboard_defconfig: *defconfig
 roseapplepi_defconfig: *defconfig