Pub publishing indicates warning because of submodule

[dustinlessard-wf]

Describe the bug
When running a pub publish dry run,

1 checked-in file is ignored by a .gitignore`.
Previous versions of Pub would include those in the published package.

Consider adjusting your .gitignore files to not ignore those files, and if you do not wish to
publish these files use .pubignore. See also dart.dev/go/pubignore

Files that are checked in while gitignored:

lib/src/sdk/proto/opentelemetry-proto/.vscode/settings.json`

Steps to reproduce
If possible, provide a recipe for reproducing the error.

What did you expect to see?
A clear and concise description of what you expected to see.

What did you see instead?
A clear and concise description of what you saw instead.

What version and what artifacts are you using?
Artifacts: (e.g., opentelemetry-api, opentelemetry-sdk, which exporters, etc)
Version: (e.g., v0.4.0, 1eb551b, etc)
How did you reference these artifacts? (excerpt from your pubspec.lock, pubspec.yaml, etc)

Environment
Dart Version: 2.16.6
OS: Mac OS Monterey 12.5