docs: add ELMO Cloud HR & Payroll to list of users on readme

[rayzor65]

SUMMARY

Add ELMO Cloud HR & Payroll to list of users on readme.md

ADDITIONAL INFORMATION

• Has associated issue:
• Changes UI
• Requires DB Migration.
• Confirm DB Migration upgrade and downgrade tested.
• Introduces new feature or API
• Removes existing feature or API
• [x ] Documentation

[codecov-commenter]

Codecov Report

Merging #9960 into master will increase coverage by 0.00%.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #9960   +/-   ##
=======================================
  Coverage   71.34%   71.34%           
=======================================
  Files         585      585           
  Lines       30889    30889           
  Branches     3237     3237           
=======================================
+ Hits        22037    22039    +2     
+ Misses       8743     8741    -2     
  Partials      109      109           

Flag	Coverage Δ
#cypress	53.98% <ø> (+0.06%)	⬆️
#javascript	59.40% <ø> (ø)
#python	71.53% <ø> (ø)

Impacted Files	Coverage Δ
.../src/dashboard/components/gridComponents/Chart.jsx	88.76% <0.00%> (-1.13%)	⬇️
...rontend/src/SqlLab/components/QueryAutoRefresh.jsx	72.72% <0.00%> (+6.81%)	⬆️

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