Corrected helper text link color

[shivasankaran18]

Closes #334

This PR fixes the issue where the Template Playground link inside the HelperText component had inconsistent colors across dark and light themes. The link now properly retains its cyan (#19c6c7) color in both themes.

Changes

• Fixed link color by explicitly setting color: #19c6c7 !important; to override inherited styles.
• Ensured that dark mode does not override the link color.

Flags

• Verify that no global CSS overrides are affecting the link styles.
• Ensure the cyan color remains visible in both themes with accessibility in mind.

Screenshots or Video

Fixed Appearance

Author Checklist

• Ensure you provide a DCO sign-off for your commits using the --signoff option of git commit.
• Vital features and changes captured in unit and/or integration tests.
• Commit messages follow AP format.
• Extend the documentation, if necessary.
• Merging to main from fork:branchname.

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[shivasankaran18]

@DianaLease could you review this PR ?