docs: clarify Tracer auto_patch as per #108

[heitorlessa]

Issue #, if available: #108

Description of changes:

Clarifies auto_patch=False feature when reusing Tracer across multiple modules, or in Lambda Layers, where import order creates a side effect where no modules end up being patched.

Checklist

• Meet tenets criteria
• Update tests
• Update docs
• PR title follows conventional commit semantics

Breaking change checklist

RFC issue #:

• Migration process documented
• Implement warnings (if it can live side by side)

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[codecov-commenter]

Codecov Report

Merging #109 into develop will not change coverage.
The diff coverage is n/a.

@@ Coverage Diff @@ ## develop #109 +/- ## ========================================= Coverage 100.00% 100.00% ========================================= Files 17 17 Lines 499 499 Branches 46 46 ========================================= Hits 499 499 

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[michaelbrewer]

Thanks this clarifies it well!