chore: fixing a pluralization typo

[rusackas]

SUMMARY

Fixes a typo with an error message. Should be "an issue" not "an issues" for correct pluralization.

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

TESTING INSTRUCTIONS

ADDITIONAL INFORMATION

• Has associated issue:
• Required feature flags:
• Changes UI
• Includes DB Migration (follow approval process in SIP-59)
  • Migration is atomic, supports rollback & is backwards-compatible
  • Confirm DB migration upgrade and downgrade tested
  • Runtime estimates and downtime expectations provided
• Introduces new feature or API
• Removes existing feature or API

[codecov]

Codecov Report

Merging #19295 (b8440be) into master (f9feb1b) will not change coverage.
The diff coverage is 0.00%.

@@           Coverage Diff           @@
##           master   #19295   +/-   ##
=======================================
  Coverage   66.64%   66.64%           
=======================================
  Files        1670     1670           
  Lines       64590    64590           
  Branches     6506     6506           
=======================================
  Hits        43047    43047           
  Misses      19860    19860           
  Partials     1683     1683           

Flag	Coverage Δ
hive	52.60% <ø> (ø)
javascript	51.39% <0.00%> (ø)
mysql	81.62% <ø> (ø)
postgres	81.67% <ø> (ø)
presto	52.45% <ø> (ø)
python	82.09% <ø> (ø)
sqlite	81.44% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...perset-frontend/src/views/CRUD/welcome/Welcome.tsx	75.00% <0.00%> (ø)

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