feat: enable Fedora 41 builds

This is not a complete PR yet, it only adds the workflow to run on Fedora 41.  We still need to switch around the LATEST, STABLE and GTS labels to the new images before this is GA.

.github/workflows/build-41.yml

@@ -0,0 +1,15 @@
+name: ublue main 41
+on:
+  pull_request:
+  merge_group:
+  schedule:
+    - cron: '5 4 * * *'  # 4am-ish UTC everyday (timed against official fedora container pushes)
+  workflow_dispatch:
+
+jobs:
+  build:
+    name: build
+    uses: ./.github/workflows/reusable-build.yml
+    secrets: inherit
+    with:
+      fedora_version: 41