Bump anstream from 0.6.7 to 0.6.15 in the cargo group

Bumps the cargo group with 1 update: [anstream](https://github.com/rust-cli/anstyle).


Updates `anstream` from 0.6.7 to 0.6.15
- [Commits](rust-cli/anstyle@anstream-v0.6.7...anstream-v0.6.15)

---
updated-dependencies:
- dependency-name: anstream
  dependency-type: indirect
  dependency-group: cargo
...

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