fix: apply ruff formatting to unblock lint CI for release/analytics/5.3.0

[Copilot]

ruff format --check . was failing in the lint job with "2 files would be reformatted," blocking PR #186.

Changes

• .github/copilot-instructions.md — trailing comma on polling_interval_in_seconds=90
• README.md — normalize string quotes (single → double) in code examples, add trailing commas, reflow a long Mixpanel(...) constructor call for line-length compliance

Formatting-only; no logic changes.

[greptile-apps]

Confidence Score: 5/5

The PR appears safe to merge.

The changes are limited to behavior-preserving formatting in documentation code examples.

Important Files Changed

Filename	Overview
.github/copilot-instructions.md	Adds a trailing comma to a configuration example.
README.md	Normalizes quotes, spacing, trailing commas, and line wrapping in Python examples.

_{Reviews (1): Last reviewed commit: "Apply Ruff formatting to fix lint CI" | Re-trigger Greptile}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.25%. Comparing base (a8a9c56) to head (b234017).

Additional details and impacted files

@@                   Coverage Diff                    @@
##           release/analytics/5.3.0     #187   +/-   ##
========================================================
  Coverage                    96.25%   96.25%           
========================================================
  Files                           13       13           
  Lines                         2616     2616           
  Branches                       139      139           
========================================================
  Hits                          2518     2518           
  Misses                          64       64           
  Partials                        34       34           

Flag	Coverage Δ
openfeature-provider	54.06% <ø> (ø)

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