Update actions/setup-dotnet action to v3 (#2977)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

.github/workflows/build.yml

@@ -43,7 +43,7 @@ jobs:
       NUGET_PACKAGES: ${{ github.workspace }}/.nuget/packages
     steps:
       - name: Set up dotnet
-        uses: actions/setup-dotnet@a351d9ea84bc76ec7508debf02a39d88f8b6c0c0 # v2.1.1
+        uses: actions/setup-dotnet@3447fd6a9f9e57506b15f895c5b76d3b197dc7c2 # v3.2.0
         with:
           dotnet-version: "6.0.x"