fix: update Linux build environment to Ubuntu 24.04 for .NET 9 compatibility

- Upgraded from Ubuntu 20.04/22.04 to Ubuntu 24.04 (noble)
- Updated libicu dependency from libicu66/70 to libicu74
- Fixed ARM64 repository URLs to use 'noble' instead of 'focal'
- Ensures compatibility with .NET 9 requirements

This fixes the Linux build failures that were preventing GitHub releases
from being created with assets.

Author: biancode

.github/workflows/build.yml

@@ -21,11 +21,11 @@ jobs:
           - name: Linux
             os: ubuntu-latest
             runtime: linux-x64
-            container: ubuntu:20.04
+            container: ubuntu:24.04
           - name: Linux (arm64)
             os: ubuntu-latest
             runtime: linux-arm64
-            container: ubuntu:20.04
+            container: ubuntu:24.04
     name: Build ${{ matrix.name }}
     runs-on: ${{ matrix.os }}
     container: ${{ matrix.container || '' }}
@@ -37,7 +37,7 @@ jobs:
           ln -fs /usr/share/zoneinfo/Etc/UTC /etc/localtime
           apt-get update
           apt-get install -y sudo
-          sudo apt-get install -y curl wget git unzip zip libicu66 tzdata clang
+          sudo apt-get install -y curl wget git unzip zip libicu74 tzdata clang
       - name: Checkout sources
         uses: actions/checkout@v4
       - name: Setup .NET
@@ -48,9 +48,9 @@ jobs:
         if: matrix.runtime == 'linux-arm64'
         run: |
           sudo dpkg --add-architecture arm64
-          echo 'deb [arch=arm64] http://ports.ubuntu.com/ubuntu-ports/ focal main restricted
-          deb [arch=arm64] http://ports.ubuntu.com/ubuntu-ports/ focal-updates main restricted
-          deb [arch=arm64] http://ports.ubuntu.com/ubuntu-ports/ focal-backports main restricted' \
+          echo 'deb [arch=arm64] http://ports.ubuntu.com/ubuntu-ports/ noble main restricted
+          deb [arch=arm64] http://ports.ubuntu.com/ubuntu-ports/ noble-updates main restricted
+          deb [arch=arm64] http://ports.ubuntu.com/ubuntu-ports/ noble-backports main restricted' \
           | sudo tee /etc/apt/sources.list.d/arm64.list
           sudo sed -i -e 's/^deb http/deb [arch=amd64] http/g' /etc/apt/sources.list
           sudo sed -i -e 's/^deb mirror/deb [arch=amd64] mirror/g' /etc/apt/sources.list