chore(deps): bump tracing-subscriber from 0.2.11 to 0.2.15 (#34)

Bumps [tracing-subscriber](https://github.com/tokio-rs/tracing) from 0.2.11 to 0.2.15.
- [Release notes](https://github.com/tokio-rs/tracing/releases)
- [Commits](tokio-rs/tracing@tracing-subscriber-0.2.11...tracing-subscriber-0.2.15)

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]