🔄 Update GitHub Actions dependencies and .NET version

Updated GitHub Actions dependencies to their latest versions and upgraded the .NET target version from 7.0.x to 9.0.x in the NuGet deployment workflow. This ensures compatibility with newer features and improves the reliability of the pipeline.

Author: alfkonee

.github/workflows/nuget-deploy.yml

@@ -19,17 +19,17 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
       - name: Setup .NET
-        uses: actions/setup-dotnet@v3
+        uses: actions/setup-dotnet@v4
         with:
-          dotnet-version: 7.0.x
+          dotnet-version: 9.0.x
       - name: Restore dependencies
         run: dotnet restore ./JamaaTech.Smpp.Net.Client/Smpp.Net.Client.csproj
       - name: Build
         run: dotnet build --no-restore ./JamaaTech.Smpp.Net.Client/Smpp.Net.Client.csproj
       - name: Pack
         run: dotnet pack --configuration Release ./JamaaTech.Smpp.Net.Client/Smpp.Net.Client.csproj --output nupkgs
       - name: Upload artifact for Publish job
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v4
         with:
           name: .nuget-package
           path: nupkgs/*.nupkg
@@ -41,7 +41,7 @@ jobs:
     steps:
       - name: Download artifact from build job
         id: download
-        uses: actions/download-artifact@v2
+        uses: actions/download-artifact@v4
         with:
           name: .nuget-package
       - name: Publish