Display just the date in the CSV output of facility capacity for the updated date column

[GokulramGHV]

Proposed Changes

• Add modified date formatting to CSV output in FacilityCapacity model

Associated Issue

• Facility Capacity Export updated date field is not showing date properly care_fe#6603

Merge Checklist

• Tests added/fixed
• Update docs in /docs
• Linting Complete
• Any other necessary step

Only PR's with test cases included and passing lint and test pipelines will be reviewed

@coronasafe/care-backend-maintainers @coronasafe/care-backend-admins

[codecov]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (fa5ba42) 60.62% compared to head (0d368aa) 60.62%.

Files	Patch %	Lines
care/facility/models/facility.py	0.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1719   +/-   ##
=======================================
  Coverage   60.62%   60.62%           
=======================================
  Files         210      210           
  Lines       11484    11484           
  Branches     1633     1633           
=======================================
  Hits         6962     6962           
  Misses       4284     4284           
  Partials      238      238           

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