[Buildroot] [PATCH:LTS] gitlab-ci: update the image version

[Yann E. MORIN]

We get newer CA certificates, to get rid of the annoying issues with the
now-expired Let's Encrypt root certificate.

Suggested-by: Peter Korsgaard <peter at korsgaard.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998 at free.fr>
Cc: Romain Naour <romain.naour at gmail.com>

---
Before applying this patch, first check that the image is available
on the Docker hub, as pushing 650+MiB takes quite some time on my
DSL line...
---
 .gitlab-ci.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index e85ac32033..61194d4a54 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,7 +1,7 @@
 # Configuration for Gitlab-CI.
 # Builds appear on https://gitlab.com/buildroot.org/buildroot/pipelines
 
-image: buildroot/base:20200814.2228
+image: buildroot/base:20211120.1925
 
 stages:
   - generate-gitlab-ci
-- 
2.25.1