Try changing to a different label

It will use the image ghcr.io/catthehacker/ubuntu:act-22.04

.forgejo/workflows/manual.yml

@@ -8,7 +8,7 @@ on:
 jobs:
   ls:
     name: List
-    runs-on: docker
+    runs-on: ubuntu-act
     steps:
       - name: Checkout the repository
         uses: https://forge.niblock.tech/actions/checkout@v4