ci: use private setup-ninja action

Author: madebr

.github/workflows/main.yml

@@ -24,6 +24,12 @@ jobs:
  - { name: Macos, os: macos-latest, shell: sh, vendored: false, cmake: '-DSDLIMAGE_DEPS_SHARED=OFF -GNinja', shared: 1, static: 0, artifact: 'SDL3_image-macos' }
 
  steps:
+ - uses: actions/checkout@v4
+ with:
+ submodules: ${{ matrix.platform.vendored && 'recursive' }}
+ - name: Set up ninja
+ if: ${{ !contains(matrix.platform.shell, 'msys2') }}
+ uses: ./.github/actions/setup-ninja
 
  - uses: ilammy/msvc-dev-cmd@v1
  if: ${{ matrix.platform.msvc }}
@@ -49,9 +55,6 @@ jobs:
  ${{ matrix.platform.msys-env }}-libtiff
  ${{ matrix.platform.msys-env }}-libwebp
  ${{ matrix.platform.msys-env }}-zlib
- - name: Install Ninja
- uses: aseprite/get-ninja@main
- if: ${{ !contains(matrix.platform.shell, 'msys2') }}
  - name: Set up SDL
  id: sdl
  uses: libsdl-org/setup-sdl@main
@@ -84,10 +87,6 @@ jobs:
  uses: ilammy/setup-nasm@v1
  if: ${{ matrix.platform.vendored && !contains(matrix.platform.shell, 'msys2') }}
 
- - uses: actions/checkout@v4
- with:
- submodules: ${{ matrix.platform.vendored && 'recursive' }}
-
  - name: Check that versioning is consistent
  # We only need to run this once: arbitrarily use the Linux build
  if: ${{ runner.os == 'Linux' }}