CMake: Remove use of ZLIB_BUILD_EXAMPLES option in workflow.

.github/workflows/c-std.yml

@@ -133,7 +133,7 @@ jobs:
     - name: Generate project files (cmake)
       if: matrix.builder == 'cmake'
       run: |
-        cmake -S . -B . -D CMAKE_BUILD_TYPE=Release -D ZLIB_BUILD_EXAMPLES=OFF  ${{ matrix.os.cmake-opt }}
+        cmake -S . -B . -D CMAKE_BUILD_TYPE=Release ${{ matrix.os.cmake-opt }}
       env:
         CC: ${{ matrix.compiler }}
         CFLAGS: -std=${{ matrix.std.value }} ${{ matrix.arch.compiler-opt }} -Werror -Wall -Wextra
@@ -205,4 +205,4 @@ jobs:
       run: cmake --build . --config Release -v
 
     - name: Run test cases (cmake)
-      run: ctest -C Release --output-on-failure --max-width 120
+      run: ctest -C Release --output-on-failure --max-width 120