Revert "chore: temporarily focus on windows"

This reverts commit d269260.

Author: davidjgoss

.github/workflows/build.yaml

@@ -7,7 +7,6 @@ on:
   push:
     branches:
       - main
-      - fix/flaky-api-tests
   pull_request:
     branches:
       - main
@@ -18,6 +17,7 @@ jobs:
     strategy:
       matrix:
         os:
+          - ubuntu-latest
           - windows-latest
         # these versions must be kept in sync with enginesTested.node in package.json
         node-version: [12.x, 14.x, 16.x, 17.x, 18.x, 19.x]