Replace deprecated applymap() and use two decimal places for formatting

[caleywoods]

Description

This attempts to resolve #1642

Additional information

Include any of the following (as necessary):

• For a project view (/projects/{pk_id}), we were previously formatting the total hours in the data table using :.0f, I've updated that to format using :.2f instead. This seems to correctly stop truncating hours and the test suite passes.

• The original ticket also mentions DataTable.applymap() being deprecated and replaced by DataTable.map(). I found that DataTable.map() was already being used in the utilization/analytics.py file but the terminal complained about DataTable.applymap() in utilization/views.py on line 187, I've replaced DataTable.applymap() with DataTable.map() and that didn't seem to upset anything.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 94.17%. Comparing base (bae914e) to head (796a23a).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1743 +/- ## ======================================= Coverage 94.17% 94.17% ======================================= Files 66 66 Lines 4170 4170 ======================================= Hits 3927 3927 Misses 243 243 ```

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