[ISSUE #5923] Fix tiered store README.md error

[yuz10]

Which Issue(s) This PR Fixes

Fixes #5923

Brief Description

How Did You Test This Change?

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 42.91%. Comparing base (89c1509) to head (7583c68).
Report is 1 commits behind head on develop.

Additional details and impacted files

@@              Coverage Diff              @@
##             develop    #8115      +/-   ##
=============================================
- Coverage      42.93%   42.91%   -0.02%     
+ Complexity     10387    10382       -5     
=============================================
  Files           1270     1270              
  Lines          88693    88693              
  Branches       11401    11401              
=============================================
- Hits           38079    38066      -13     
- Misses         45925    45929       +4     
- Partials        4689     4698       +9     

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