github actions build stalls on occasion

[jwunderl]

This causes the build to run for 6 hours before timing out and sending an email saying it failed. e.g. https://github.com/microsoft/vscode-makecode/actions/runs/4377012512/jobs/7659924636#step:7:45 or https://github.com/microsoft/vscode-makecode/actions/runs/4359010138/jobs/7620307027

Not a big deal as we can just cut and restart the build, but it's nice to avoid 'turn it off and on again' as a solution whenever possible :)

error

webpack 5.75.0 compiled with 1 warning in 4749 ms
$ vscode-test-web --browserType=chromium --extensionDevelopmentPath=. --extensionTestsPath=dist/web/test/suite/index.js
@vscode/test-web: 0.0.30
Downloading VS Code InsidersDownloading VS Code Insiders: 4931578/14427917 (34%)Downloading VS Code Insiders: complete
Unpacking VS Code InsidersUnpacking VS Code Insiders: complete
Serving dev extensions from /home/runner/work/vscode-makecode/vscode-makecode
Listening on http://localhost:3000
Invalid arguments: should be exactly one string.: Error: Invalid arguments: should be exactly one string.
    at k.j (http://localhost:3000/static/build/out/vs/workbench/workbench.web.main.js:617:26761)
    at Object.log (http://localhost:3000/static/build/out/vs/workbench/workbench.web.main.js:617:26683)
    at k.error (http://localhost:3000/static/build/out/vs/workbench/workbench.web.main.js:617:[39](https://github.com/microsoft/vscode-makecode/actions/runs/4359010138/jobs/7620307027#step:7:40)69)
    at d.error (http://localhost:3000/static/build/out/vs/workbench/workbench.web.main.js:617:4510)
    at k.error (http://localhost:3000/static/build/out/vs/workbench/workbench.web.main.js:618:4664)
    at P.Yb (http://localhost:3000/static/build/out/vs/workbench/workbench.web.main.js:2536:74488)
    at t.a (http://localhost:3000/static/build/out/vs/workbench/workbench.web.main.js:2536:7[41](https://github.com/microsoft/vscode-makecode/actions/runs/4359010138/jobs/7620307027#step:7:42)31)
    at t.onUnexpectedError (http://localhost:3000/static/build/out/vs/workbench/workbench.web.main.js:10:2[49](https://github.com/microsoft/vscode-makecode/actions/runs/4359010138/jobs/7620307027#step:7:50))
    at R (http://localhost:3000/static/build/out/vs/workbench/workbench.web.main.js:10:603)
    at P.startup (http://localhost:3000/static/build/out/vs/workbench/workbench.web.main.js:2536:7[50](https://github.com/microsoft/vscode-makecode/actions/runs/4359010138/jobs/7620307027#step:7:51)62)