chore(lint/a11y): fixing and locking down jsx-a11y/anchor-is-valid

[rusackas]

SUMMARY

There was only one violation of this rule, due to an tag that seems to have no purpose. Tag removed, and locking down the eslint rule to throw an error rather than a warning.

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

All modified and coverable lines are covered by tests ✅

Comparison is base (6bc85a0) 67.22% compared to head (c6c133a) 67.22%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master   #26820   +/-   ##
=======================================
  Coverage   67.22%   67.22%           
=======================================
  Files        1895     1895           
  Lines       74211    74211           
  Branches     8245     8245           
=======================================
  Hits        49891    49891           
  Misses      22248    22248           
  Partials     2072     2072           

Flag	Coverage Δ
javascript	56.98% <ø> (ø)

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