Update setup-dotnet action to v4 in CI workflows

Author: TheAngryByrd

.github/workflows/main.yml

@@ -14,7 +14,7 @@ jobs:
     steps:
     - uses: actions/checkout@v2
     - name: Setup .NET Core
-      uses: actions/setup-dotnet@v4.3
+      uses: actions/setup-dotnet@v4
       with:
         dotnet-version: ${{ matrix.dotnet }}
     - name: Install local tools

.github/workflows/release.yml

@@ -18,7 +18,7 @@ jobs:
       with:
         ref: ${{ github.head_ref }}
     - name: Setup .NET Core
-      uses: actions/setup-dotnet@4.3
+      uses: actions/setup-dotnet@v4
       with:
         dotnet-version: ${{ matrix.dotnet }}
     - name: Restore tools