Update CI

Author: js6pak

.github/workflows/main.yml

@@ -4,25 +4,24 @@ on: [ "push", "pull_request" ]
 
 jobs:
   build:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-24.04
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           submodules: true
 
       - name: Setup .NET
-        uses: actions/setup-dotnet@v2
+        uses: actions/setup-dotnet@v4
         with:
-          dotnet-version: 6.x
+          dotnet-version: 9.x
 
       - name: Run the Cake script
-        uses: cake-build/cake-action@v1
+        uses: cake-build/cake-action@v3
         with:
           verbosity: Diagnostic
-          cake-version: 4.2.0
 
-      - uses: actions/upload-artifact@v3
+      - uses: actions/upload-artifact@v4
         with:
           name: nuget packages
           path: ./BepInEx.AssemblyPublicizer*/bin/Release/*.nupkg