Fix version bump auto-commit in release job

[ctreatma]

The push-button release job figures out the correct version for the next release, writes that to the version file, regenerates the SDK, and then commits the changes to main so that the release can be tagged.

We use the git plugin for semantic-release to commit the version bump changes; unfortunately this plugin uses an assets array to specify commit assets, and bypasses .gitignore when determining what files to commit.

The assets array we currently use appears to be too narrow; as a result, a recent sync job opened a PR that included no spec changes (because the SDK is up-to-date with the API spec), but included changes related to the most recent version bump.