Fix build on GitHub actions, mk. 2

Author: TheAssassin

.github/workflows/main.yml

@@ -3,30 +3,16 @@ name: CI
 on: [push, pull_request]
 
 jobs:
-  appimage-x86_64:
-    name: AppImage x86_64
-    runs-on: ubuntu-18.04
-    env:
-      ARCH: x86_64
-      DIST: bionic
-    steps:
-      - uses: actions/checkout@v2
-        with:
-          submodules: recursive
-      - name: Build AppImage in Docker
-        run: bash -ex ci/build-in-docker.sh
-      - name: Archive artifacts
-        uses: actions/upload-artifact@v2
-        with:
-          name: AppImage x86_64
-          path: zsync*.AppImage*
+  appimage:
+    schedule:
+      matrix:
+        ARCH: [x86_64, i386]
 
-  appimage-i386:
-    name: AppImage i386
-    runs-on: ubuntu-18.04
+    name: AppImage ${{ matrix.ARCH }}
+    runs-on: ubuntu-latest
     env:
-      ARCH: i386
-      DIST: xenial
+      ARCH: ${{ matrix.ARCH }}
+      DIST: bionic
     steps:
       - uses: actions/checkout@v2
         with:
@@ -36,14 +22,13 @@ jobs:
       - name: Archive artifacts
         uses: actions/upload-artifact@v2
         with:
-          name: AppImage i386
+          name: AppImage ${{ matrix.ARCH }}
           path: zsync*.AppImage*
 
   upload:
     name: Create release and upload artifacts
     needs:
-      - appimage-x86_64
-      - appimage-i386
+      - appimage
     runs-on: ubuntu-latest
     steps:
       - name: Download artifacts