[ci] run in fedora container

.github/workflows/ci.yml

@@ -8,6 +8,7 @@ defaults:
 jobs:
   test:
     runs-on: ubuntu-latest
+    container: fedora:40
     steps:
       - uses: actions/checkout@v4
         with:
@@ -25,7 +26,7 @@ jobs:
           sudo chown -R $(id -u):$(id -g) antlir2-out
       - name: Install deps
         run: |
-          sudo apt install \
+          sudo dnf install -y \
             cpio jq libcap-dev systemd-container
 
       - name: Disable watchman