Fix trivial typo in docs of Tracing

[mksiq]

📬 Issue #, if available:
N/A
✍️ Description of changes:
Tiny documentation fix replacing predecence with precedence word
🔏 By submitting this pull request

• I confirm that I've ran cargo +nightly fmt.
• I confirm that I've ran cargo clippy --fix.
• I confirm that I've made a best effort attempt to update all relevant documentation.
• I confirm that my contribution is made under the terms of the Apache 2.0 license.

[mksiq]

Trivial change

By submitting this pull request

• I confirm that my contribution is made under the terms of the Apache 2.0 license.
• I confirm that I've made a best effort attempt to update all relevant documentation.

[calavera]

Thanks!