[libgda/LIBGDA_5.2] CI: switch to ubuntu 20.10 image

[Daniel Espinosa Ortiz <despinosa src gnome org>]

commit c86d259673bf479eb772bb2abdc5243b608b8f94
Author: Daniel Espinosa <esodan gmail com>
Date:   Sat Jan 30 14:52:53 2021 -0600

    CI: switch to ubuntu 20.10 image

 .gitlab-ci.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index a11ddf1cb..4f635e4e0 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -2,7 +2,7 @@
 # use the official gcc image, based on debian
 # can use verions as well, like gcc:5.2
 # see https://hub.docker.com/_/gcc/
-image: ubuntu:19.10
+image: ubuntu:20.10
 
 services:
   - postgres:latest