fix typo again

Author: mattnite

.github/workflows/build.yml

@@ -44,7 +44,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [windows-latest, linux-latest, macos-latest]
+        os: [windows-latest, ubuntu-latest, macos-latest]
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v2