[jhbuild/wip/hadess/fix-ubuntu-ci] ci: Fix Ubuntu CI

[Bastien Nocera <hadess src gnome org>]

commit 151a4167116d99ba65f57ae983b2861ee3c64af6
Author: Bastien Nocera <hadess hadess net>
Date:   Fri Oct 1 14:08:22 2021 +0200

    ci: Fix Ubuntu CI
    
    fatal: unable to access 'https://gitlab.gnome.org/GNOME/yelp-xsl/': server certificate verification 
failed. CAfile: none CRLfile: none
    
    The Let's Encrypt root cert expired, and the OS needs updating to
    include the newer root cert.

 .gitlab-ci.yml | 4 ++++
 1 file changed, 4 insertions(+)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 593c4eb4..70b7f0a3 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -28,6 +28,10 @@ test-py3:
 
 ub20.04-py3-glib:
   image: registry.gitlab.gnome.org/gnome/jhbuild/jhbuild:v5
+  before_script:
+    # Update for root cert updates
+    - sudo apt-get update
+    - sudo apt-get upgrade -y
   script:
     - ./autogen.sh --with-python=python3
     - make