Pin actions to macos-13 because libsass.dylib issues

Author: devlead

.github/workflows/build.yml

@@ -12,7 +12,8 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [windows-latest, ubuntu-latest, macos-latest]
+        # libsass.dylib is not working on macos-14
+        os: [windows-latest, ubuntu-latest, macos-13]
     env:
       # https://github.com/NuGet/Home/issues/11548
       # https://twitter.com/xoofx/status/1488617114940452872?s=20&t=BKSN4j9rP6fOyg8l7aW0eg