[at-spi2-core] CI: update the container image tag for the main branch

[Federico Mena Quintero <federico src gnome org>]

commit e83d5558d2fbded5b345b0af254f26865e148e49
Author: Federico Mena Quintero <federico gnome org>
Date:   Wed Jul 6 11:33:50 2022 -0500

    CI: update the container image tag for the main branch

 ci/container_builds.yml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/ci/container_builds.yml b/ci/container_builds.yml
index f192828a..4a895a08 100644
--- a/ci/container_builds.yml
+++ b/ci/container_builds.yml
@@ -12,8 +12,8 @@ include:
 
 variables:
   # When branching change the suffix to avoid conflicts with images
-  # from the master branch
-  BASE_TAG: "2022-06-09.0-master"
+  # from the main branch
+  BASE_TAG: "2022-07-06.0-main"
   RUST_STABLE: "1.58.1"
 
 .container.opensuse@x86_64: