update recency_emphasis to be greater than 1 in test cases

[jackiehanyang]

Description

[Describe what this change achieves]

Related Issues

Resolves #[Issue number to be closed when this PR is merged]

Check List

• New functionality includes testing.
• New functionality has been documented.
• API changes companion pull request created.
• Commits are signed per the DCO using --signoff.
• Public documentation issue/PR created.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.55%. Comparing base (e33ff46) to head (3e06458).

Additional details and impacted files

@@            Coverage Diff            @@
##               main    #1406   +/-   ##
=========================================
  Coverage     81.55%   81.55%           
- Complexity     5855     5861    +6     
=========================================
  Files           533      533           
  Lines         23675    23675           
  Branches       2375     2375           
=========================================
+ Hits          19308    19309    +1     
- Misses         3203     3205    +2     
+ Partials       1164     1161    -3     

Flag	Coverage Δ
plugin	81.55% <ø> (+<0.01%)	⬆️

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see 13 files with indirect coverage changes