Fix CI for font tests on Ubuntu

Author: cyanfish

.github/workflows/dotnet.yml

@@ -9,6 +9,9 @@ jobs:
       matrix:
         os: [windows-2022, ubuntu-22.04, macos-12]
     steps:
+    - name: Install OS dependencies
+      if: matrix.os == 'ubuntu-22.04'
+      run: sudo apt-get install -y fonts-noto-core fonts-noto-cjk
     - uses: actions/checkout@v2
     - name: Setup .NET 8
       uses: actions/setup-dotnet@v3