Update ci_src_examples_win.yml

.github/workflows/ci_src_examples_win.yml

@@ -9,6 +9,8 @@ jobs:
     - uses: actions/checkout@v1
     - name: Enable MSVC Developer Command Prompt
       uses: ilammy/msvc-dev-cmd@v1.0.0
+    - run: mkdir build
+    - run: cd build
     - name: Setup CMake Project
       run: cmake -G Visual Studio 14 2015 -DSTATIC=ON -DSHARED=ON -DBUILD_EXAMPLES=ON -DBUILD_GAMES=OFF -DINCLUDE_EVERYTHING=ON ..
     - name: Build raylib Source & Examples