lib.time.formats.synapse naming nit

[rakuy0]

Per goback

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.48%. Comparing base (cc60ea9) to head (a194af1).
⚠️ Report is 1 commits behind head on synapse-3xx.

Additional details and impacted files

@@             Coverage Diff              @@
##           synapse-3xx    #4910   +/-   ##
============================================
  Coverage        96.48%   96.48%           
============================================
  Files              259      259           
  Lines            63207    63207           
============================================
  Hits             60983    60983           
  Misses            2224     2224           

Flag	Coverage Δ
linux	96.48% <ø> (ø)

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[vEpiphyte]

docstrings still reference the old synapse var