Try to use aseprite/get-ninja GitHub action in workflows

Author: dacap

.github/workflows/build.yml

@@ -10,18 +10,11 @@ jobs:
         enable_image: [on, off]
     steps:
     - uses: actions/checkout@v4
+    - uses: aseprite/get-ninja@ci
     - uses: ilammy/msvc-dev-cmd@v1
       if: runner.os == 'Windows'
     - name: Generating Makefiles
-      shell: bash
-      run: |
-        if [[ "${{ runner.os }}" == "Windows" ]] ; then
-          cmake . -G "NMake Makefiles" \
-                  -DCLIP_ENABLE_IMAGE=${{ matrix.enable_image }}
-        else
-          cmake . -G "Unix Makefiles" \
-                  -DCLIP_ENABLE_IMAGE=${{ matrix.enable_image }}
-        fi
+      run: cmake . -G "Ninja" -DCLIP_ENABLE_IMAGE=${{ matrix.enable_image }}
     - name: Compiling
       shell: bash
       run: cmake --build .
@@ -41,11 +34,12 @@ jobs:
       run:
         shell: msys2 {0}
     steps:
+    - uses: aseprite/get-ninja@ci
     - uses: msys2/setup-msys2@v2
       with:
         release: false
         msystem: ${{matrix.sys}}
-        pacboy: cc:p cmake:p ninja:p
+        pacboy: cc:p cmake:p
     - uses: actions/checkout@v4
     - name: Generating Makefiles
       run: cmake .