update checkout and setup-dotnet actions

.github/workflows/dotnet.yml

@@ -9,12 +9,12 @@ jobs:
         runs-on: windows-latest
         steps:
             -   name: Checkout
-                uses: actions/checkout@v2
+                uses: actions/checkout@v4
                 with:
                     fetch-depth: 0
                     submodules: 'recursive'
             -   name: Install .NET 8
-                uses: actions/setup-dotnet@v1
+                uses: actions/setup-dotnet@v4
                 with:
                     dotnet-version: 8.0.x
             -   name: Mutate Run Number