ci: remove old dotnet versions (#126)

Author: phnx47-bot

.github/workflows/ci.yml

@@ -19,22 +19,12 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
 
-      - name: Setup .NET
-        uses: actions/setup-dotnet@v4
-        with:
-          dotnet-version: |
-            3.1.x
-            5.0.x
-            6.0.x
-            7.0.x
-            8.0.x
-
       - name: Run tests
         run: dotnet test -c Release --filter FullyQualifiedName\!~Tests.Integration -p:CollectCoverage=false
 
   build-linux:
     name: Build, Test & Pack (Linux)
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-24.04
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -45,10 +35,7 @@ jobs:
         uses: actions/setup-dotnet@v4
         with:
           dotnet-version: |
-            3.1.x
-            5.0.x
             6.0.x
-            7.0.x
             8.0.x
 
       - name: Build
@@ -98,7 +85,7 @@ jobs:
         with:
           name: nupkgs
       - name: Push to pkg.github.com
-        run: dotnet nuget push "**/*.nupkg" -s https://nuget.pkg.github.com/prom-client-net/index.json -k ${{ secrets.GH_FULL_PAT }}
+        run: dotnet nuget push "**/*.nupkg" -s https://nuget.pkg.github.com/${{ github.repository_owner }}/index.json -k ${{ secrets.GH_FULL_PAT }}
 
   nuget:
     name: Deploy to NuGet