[gnome-flashback/gnome-3-38] ci: use ubuntu 20.10 image

[Alberts Muktupāvels <muktupavels src gnome org>]

commit 0cc24ee39dc31af0ff9809c5e849a0a2f80a8530
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Sun Mar 14 15:58:47 2021 +0200

    ci: use ubuntu 20.10 image

 .gitlab-ci.yml | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 2acd51a..e433249 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -46,7 +46,7 @@ variables:
                   xkb-data
 
 menu:
-  image: ubuntu:devel
+  image: ubuntu:groovy
   stage: validate
   except:
     - tags
@@ -59,7 +59,7 @@ menu:
       data/menus/gnome-flashback-applications.menu
 
 ubuntu:
-  image: ubuntu:devel
+  image: ubuntu:groovy
   stage: build
   except:
     - tags
@@ -72,7 +72,7 @@ ubuntu:
     - make distcheck
 
 coverity:
-  image: ubuntu:devel
+  image: ubuntu:groovy
   stage: analysis
   when: manual
   before_script: