Add a 'fail-fast: false' line to the build straetgy. It might be true…

… (now) that because the mac build fails, even though continue-on-error is true, the final autobuild step isn't triggered

.github/workflows/build.yaml

@@ -3,6 +3,7 @@ on: [push]
 jobs:
   build:
     strategy:
+      fail-fast: false
       matrix:
         os: [windows-xlarge]
         addrsize: ["64"]