Fix build.yaml line that got dropped in the merge.

.github/workflows/build.yaml

@@ -19,6 +19,7 @@ jobs:
             developer_dir: "/Applications/Xcode_14.0.1.app/Contents/Developer"
         exclude:
           - runner: macos-12-xl
+            configuration: ReleaseOS
     runs-on: ${{ matrix.runner }}
     outputs:
       viewer_channel: ${{ steps.build.outputs.viewer_channel }}