[gnome-applets/gnome-3-42] ci: use ubuntu 21.10 image

[Alberts Muktupāvels <muktupavels src gnome org>]

commit ca2f072b8acd1a68359cf210ea3c0f3920deeb90
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Sat Mar 12 22:04:28 2022 +0200

    ci: use ubuntu 21.10 image

 .gitlab-ci.yml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index c4cc5bd16..1fb3fbd7f 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -37,7 +37,7 @@ variables:
                   yelp-tools
 
 ubuntu:
-  image: ubuntu:devel
+  image: ubuntu:impish
   stage: build
   except:
     - tags
@@ -50,7 +50,7 @@ ubuntu:
     - make distcheck
 
 coverity:
-  image: ubuntu:devel
+  image: ubuntu:impish
   stage: analysis
   when: manual
   before_script: