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)

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[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!