Fix ninja path issue

Author: JSUYA

.github/workflows/build.yml

@@ -166,8 +166,7 @@ jobs:
             --runtime-mode=${{ matrix.mode }} `
             --no-goma `
             --target-dir build
-          # TODO(jsuya) : https://github.com/flutter/flutter/issues/163487
-          C:\workspace\flutter\engine\src\flutter/third_party/ninja/ninja -C .\out\build gen_snapshot
+          ninja -C .\out\build gen_snapshot
 
       - uses: actions/upload-artifact@v4
         with:
@@ -224,8 +223,7 @@ jobs:
             --disable-desktop-embeddings \
             --target-dir build
           cd engine/src
-          # TODO(jsuya) : https://github.com/flutter/flutter/issues/163487
-          flutter/third_party/ninja/ninja -C out/build clang_arm64/gen_snapshot
+          ninja -C out/build clang_arm64/gen_snapshot
 
       - uses: actions/upload-artifact@v4
         with:
@@ -282,8 +280,7 @@ jobs:
             --disable-desktop-embeddings \
             --target-dir build
           cd engine/src
-          # TODO(jsuya) : https://github.com/flutter/flutter/issues/163487
-          flutter/third_party/ninja/ninja -C out/build clang_x64/gen_snapshot
+          ninja -C out/build clang_x64/gen_snapshot
 
       - uses: actions/upload-artifact@v4
         with: