[librsvg/librsvg-2.55] Bump the container base tag for the librsvg-2.55 branch

[Federico Mena Quintero <federico src gnome org>]

commit 0613ce1164a274df1fc22cc49aacf3cc817e1929
Author: Federico Mena Quintero <federico gnome org>
Date:   Mon Sep 5 18:07:32 2022 -0500

    Bump the container base tag for the librsvg-2.55 branch

 ci/container_builds.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/ci/container_builds.yml b/ci/container_builds.yml
index ddec657d4..96425c086 100644
--- a/ci/container_builds.yml
+++ b/ci/container_builds.yml
@@ -6,7 +6,7 @@ include:
 variables:
   # When branching change the suffix to avoid conflicts with images
   # from the main branch
-  BASE_TAG: "2022-08-17.0-main"
+  BASE_TAG: "2022-09-05.0-librsvg-2.55"
   RUST_STABLE: "1.60.0"
   RUST_MINIMUM: "1.58.1"