build-deb.yml: Set up matrix for debian and ubuntu

.forgejo/workflows/build-deb.yml

@@ -1,9 +1,15 @@
 on: [pull_request]
 jobs:
   build:
+    strategy:
+      matrix:
+        image: [
+          debian-sd:stable,
+          ubuntu-sd:jammy,
+        ]
     runs-on: docker
     container:
-      image: forge.a-lec.org/speed-dreams/debian-sd:stable
+      image: forge.a-lec.org/speed-dreams/${{ matrix.image }}
     steps:
       - name: Clone repository
         run: |
@@ -21,7 +27,7 @@ jobs:
         run: cpack -G DEB
         working-directory: /src/build
       - name: Upload Debian package
-        run: upload-artifact *.deb
+        run: upload-artifact -d ${{ matrix.image }} *.deb
         working-directory: /src/build
         env:
           URL: ${{ vars.STORE_URL }}