test: enable git-master on Debian 11

Author: dafyddj

.github/workflows/ci.yml

@@ -207,7 +207,7 @@ jobs:
       display-name: Debian 11
       container-slug: debian-11
       timeout: 20
-      instances: '["stable-3006", "onedir-3006", "stable-3006-8", "stable-3007", "onedir-3007", "stable-3007-1", "latest", "default"]'
+      instances: '["stable-3006", "onedir-3006", "stable-3006-8", "stable-3007", "onedir-3007", "stable-3007-1", "git-master", "latest", "default"]'
 
 
   debian-12:

.github/workflows/templates/generate.py

@@ -125,7 +125,6 @@
 BLACKLIST_GIT_MASTER = [
     "amazonlinux-2",
     "amazonlinux-2023",
-    "debian-11",
     "debian-13",
     "fedora-40",
     "photon-4",