Update log_enabled feature name in etw logs

[wachiraed]

Fixes #
Update the spec_unstable_logs_enabled cargo feature and enable default 

Merge requirement checklist

• CONTRIBUTING guidelines followed
• Unit tests added/updated (if applicable)
• Appropriate CHANGELOG.md files updated for non-trivial, user-facing changes
• Changes in public API reviewed (if applicable)

[lalitb]

@wachiraed - The spec_unstable_logs_enabled feature is not yet included in the published OpenTelemetry crates. The contrib repository will be updated with changes from the main repository after the next main release is published.

[wachiraed]

@wachiraed - The spec_unstable_logs_enabled feature is not yet included in the published OpenTelemetry crates. The contrib repository will be updated with changes from the main repository after the next main release is published.

Good catch. I'll look at updating while taking this into account