try fix nuget add and update checkout

Author: SlejmUr

.github/workflows/dotnet_build.yml

@@ -21,7 +21,7 @@ jobs:
       uses: actions/checkout@v4
 
     - name: Clone EIV Nuget repository
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
       with:
         repository: ExtractIntoVoid/Nuget
         path: eiv_nuget
@@ -32,7 +32,7 @@ jobs:
         dotnet-version: '8.0.x'
 
     - name: Add eiv_nuget to nuget souce
-      run: dotnet nuget add source --name eiv_nuget "eiv_nuget"
+      run: dotnet nuget add source --name eiv_nuget "${{GITHUB_WORKSPACE}}/eiv_nuget"
 
     - name: Publish
       run: dotnet publish EIV_Game.csproj -c ${{ matrix.builds }} -o Out