fix: pipeline ubuntu version

Author: cricketthomas

.github/workflows/dotnet.yml

@@ -102,7 +102,7 @@ jobs:
  path: keyvaultexplorer.osx-arm64.tar 
  build_linux:
  name: Build Linux
- runs-on: ubuntu-20.04
+ runs-on: ubuntu-24.04
  steps:
  - uses: actions/checkout@v4
  - name: Setup .NET