Update microsoft/setup-msbuild action to v3

Author: renovate[bot]

.github/workflows/build.yml

@@ -62,7 +62,7 @@ jobs:
     runs-on: windows-2022
     steps:
       - name: Setup MSBuild
-        uses: microsoft/setup-msbuild@v2
+        uses: microsoft/setup-msbuild@v3
 
       # Build Spore-ModAPI
       - name: Checkout Spore-ModAPI