Bump microsoft/setup-msbuild from 2 to 3

Bumps [microsoft/setup-msbuild](https://github.com/microsoft/setup-msbuild) from 2 to 3.
- [Release notes](https://github.com/microsoft/setup-msbuild/releases)
- [Commits](https://github.com/microsoft/setup-msbuild/compare/v2...v3)

---
updated-dependencies:
- dependency-name: microsoft/setup-msbuild
  dependency-version: '3'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/build.yml

@@ -137,7 +137,7 @@ jobs:
     steps:
     - uses: actions/checkout@v6
     - name: Add msbuild to PATH
-      uses: microsoft/setup-msbuild@v2
+      uses: microsoft/setup-msbuild@v3
     - name: cmake
       run: >
         cmake -G "Visual Studio 17 2022" -A x64 -DCMAKE_BUILD_TYPE=Release
@@ -162,7 +162,7 @@ jobs:
     steps:
     - uses: actions/checkout@v6
     - name: Add msbuild to PATH
-      uses: microsoft/setup-msbuild@v2
+      uses: microsoft/setup-msbuild@v3
     - name: cmake
       run: cmake -G "Visual Studio 17 2022" -A x64 -DCMAKE_BUILD_TYPE=Release -DFLATBUFFERS_BUILD_CPP17=ON -DFLATBUFFERS_STRICT_MODE=ON .
     - name: build
@@ -350,7 +350,7 @@ jobs:
     steps:
     - uses: actions/checkout@v6
     - name: Add msbuild to PATH
-      uses: microsoft/setup-msbuild@v2
+      uses: microsoft/setup-msbuild@v3
     - name: cmake
       run: cmake -G "Visual Studio 17 2022" -A x64 -DCMAKE_BUILD_TYPE=Release -DFLATBUFFERS_BUILD_CPP17=ON -DFLATBUFFERS_STRICT_MODE=ON .
     - name: build