chore(deps): update actions/setup-dotnet action to v4.3.1

Author: renovate[bot]

dotnet/.github/workflows/_unit_test.yml

@@ -25,7 +25,7 @@ jobs:
       - run: npm i -g npm@latest
       - run: npm ci
 
-      - uses: actions/setup-dotnet@v4.0.1
+      - uses: actions/setup-dotnet@v4.3.1
         with:
           dotnet-version: "8.x"