test-windows.yml: Update microsoft/setup-msbuild to latest version, v3.0.0

Author: stephengtuggy

.github/workflows/test-windows.yml

@@ -46,7 +46,7 @@ jobs:
       with:
         python-version: ${{ matrix.python-version }}
 
-    - uses: microsoft/setup-msbuild@v2
+    - uses: microsoft/setup-msbuild@30375c66a4eea26614e0d39710365f22f8b0af57 # v3.0.0
 
     - name: Install CMake
       uses: lukka/get-cmake@591817e96fcad43505fb4eae36172462abb3a42e # v4.3.3