ci on main runner

.forgejo/workflows/build.yaml

@@ -7,19 +7,15 @@ on:
 
 jobs:
   build:
-    runs-on: ${{ matrix.runner }}
+    runs-on: nixos
     strategy:
       matrix:
-        include:
-          # keep-sorted start block=yes
-          - host: hetzner-vpn2
-            runner: nixos-aarch64
-          - host: hyperforge
-            runner: nixos-aarch64
-          - host: muede-lpt2
-            runner: nixos
-          - host: muede-pc2
-            runner: nixos
+        host:
+          # keep-sorted start
+          - hetzner-vpn2
+          - hyperforge
+          - muede-lpt2
+          - muede-pc2
           # keep-sorted end
     steps:
       - uses: https://code.forgejo.org/actions/checkout@v4