Fix broken link in "Mapping Python to Flyte types" table

[neverett]

Why are the changes needed?

Fixes broken link in this table: https://docs.flyte.org/en/latest/user_guide/data_types_and_io/index.html#mapping-python-to-flyte-types

What changes were proposed in this pull request?

Remove bold styling to fix link.

Check all the applicable boxes

• I updated the documentation accordingly.
• All new and existing tests passed.
• All commits are signed-off.

Docs link

TK

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 59.01%. Comparing base (c21ded6) to head (5c29c76).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5122      +/-   ##
==========================================
+ Coverage   58.99%   59.01%   +0.02%     
==========================================
  Files         645      645              
  Lines       55672    55672              
==========================================
+ Hits        32843    32855      +12     
+ Misses      20233    20223      -10     
+ Partials     2596     2594       -2     

Flag	Coverage Δ
unittests	59.01% <ø> (+0.02%)	⬆️

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