fix(venues): VenueList subtitle color in dark mode

[mongj]

Context

Resolves #3718

Implementation

Before:

After:

Other Information

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[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 1 lines in your changes are missing coverage. Please review.

Project coverage is 53.59%. Comparing base (9fdd1e8) to head (918befa).

:exclamation: Current head 918befa differs from pull request most recent head bfd8dfa. Consider uploading reports for the commit bfd8dfa to get more accurate results

Files	Patch %	Lines
website/src/views/venues/VenueList.tsx	0.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #3719 +/- ## ========================================== - Coverage 53.60% 53.59% -0.01% ========================================== Files 272 272 Lines 5986 5987 +1 Branches 1433 1434 +1 ========================================== Hits 3209 3209 - Misses 2777 2778 +1 ```

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