Update runners to latest version (and install Mono on ubuntu-latest)

Author: bradwilson

.github/workflows/pull-request.yaml

@@ -13,7 +13,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [windows-2022, ubuntu-22.04, macOS-12]
+        os: [windows-latest, ubuntu-latest, macOS-latest]
     steps:
       - name: Clone source
         uses: actions/checkout@v4
@@ -31,9 +31,18 @@ jobs:
       - name: Get .NET information
         run: dotnet --info
 
+      - name: Install Mono
+        run: >
+          sudo apt-get -y install apt-transport-https dirmngr gnupg ca-certificates software-properties-common &&
+          curl 'https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x3fa7e0328081bff6a14da29aa6a19b38d3d831ef' | sudo tee /etc/apt/trusted.gpg.d/mono-official-stable.asc &&
+          sudo apt-add-repository -y --no-update 'deb https://download.mono-project.com/repo/ubuntu stable-focal main' &&
+          sudo apt update &&
+          sudo apt-get -y install mono-complete mono-vbnc
+        if: ${{ matrix.os == 'ubuntu-latest' }}
+
       - name: Get Mono information
         run: mono --version
-        if: ${{ matrix.os != 'windows-2022' }}
+        if: ${{ matrix.os != 'windows-latest' }}
 
       - name: "Build target: BuildAll"
         run: dotnet run --project tools/builder --no-launch-profile -- BuildAll

.github/workflows/push-main.yaml

@@ -9,7 +9,7 @@ on:
 jobs:
   build:
     name: "Build"
-    runs-on: windows-2022
+    runs-on: windows-latest
     env:
       DOTNET_CLI_WORKLOAD_UPDATE_NOTIFY_DISABLE: true
       DOTNET_NOLOGO: true