.github: Try building deb on 22.04 with webview

.github/workflows/python.yml

@@ -57,14 +57,7 @@ jobs:
         path: legendary/dist/*
 
   deb:
-    runs-on: ${{ matrix.os }}
-    strategy:
-      matrix:
-        os: ['ubuntu-20.04']
-
-      fail-fast: true
-      max-parallel: 3
-
+    runs-on: ubuntu-22.04
     steps:
     - uses: actions/checkout@v2
 
@@ -76,11 +69,10 @@ jobs:
         python3-requests
         python3-setuptools
         python3-wheel
-        # pywebview is too outdated on 20.04, re-enable this on 22.04
-        # python3-webview
-        # python3-gi
-        # python3-gi-cairo
-        # gir1.2-gtk-3.0
+        python3-webview
+        python3-gi
+        python3-gi-cairo
+        gir1.2-gtk-3.0
 
     - name: Build
       run: python3 setup.py --command-packages=stdeb.command bdist_deb