update ubuntu matrix build

Author: npv2k1

.github/workflows/build.yml

@@ -18,7 +18,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        platform: [macos-latest, ubuntu-20.04, windows-latest]
+        platform: [macos-latest, ubuntu-22.04, windows-latest]
 
     runs-on: ${{ matrix.platform }}
 
@@ -31,7 +31,7 @@ jobs:
           version: latest
 
       - name: install dependencies (ubuntu only)
-        if: matrix.platform == 'ubuntu-20.04'
+        if: matrix.platform == 'ubuntu-22.04'
         run: |
           sudo apt-get update
           sudo apt-get install -y libgtk-3-dev libwebkit2gtk-4.0-dev libayatana-appindicator3-dev librsvg2-dev