[gimp/wip/schumaml/add-ci-prepare-stage] biuld: typo in prepare step

[Michael Schumacher <schumaml src gnome org>]

commit 446260ef496527cb765c8535395f7997ad673e9c
Author: Michael Schumacher <schumaml gmx de>
Date:   Fri May 29 15:50:13 2020 +0200

    biuld: typo in prepare step

 .gitlab-ci.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 20f4c96a66..9eae0eb7c8 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -25,7 +25,7 @@ build-image:
   script:
     - mkdir -p /kaniko/.docker
     - echo 
"{\"auths\":{\"$CI_REGISTRY\":{\"username\":\"$CI_REGISTRY_USER\",\"password\":\"$CI_REGISTRY_PASSWORD\"}}}" 
> /kaniko/.docker/config.json
-    - echo "FROM debian/testing" > Dockerfile
+    - echo "FROM debian:testing" > Dockerfile
     - echo "RUN apt-get install -y --no-install-recommends \\" >> Dockerfile
     - echo "at-spi2-core build-essential desktop-file-utils ffmpeg ghostscript git glib-networking 
gobject-introspection graphviz-dev gtk-doc-tools hicolor-icon-theme intltool iso-codes libappstream-glib-dev 
libbz2-dev libdbus-glib-1-dev libexif-dev libgexiv2-dev libgirepository1.0-dev libgtk-3-bin libgtk-3-dev 
libgudev-1.0-dev libjson-glib-dev liblcms2-dev liblzma-dev libmng-dev libmypaint-dev libopenexr-dev 
libpoppler-glib-dev libraw-dev libraw19 librsvg2-dev libspiro-dev libsuitesparse-dev libtiff-dev libtiff5-dev 
libtool libumfpack5 libwebp-dev libwmf-dev libxmu-dev libxpm-dev luajit meson mypaint-brushes poppler-data 
python3 valac xauth xvfb" >> Dockerfile