Update arguments.py - update docstring to match quickstart

[yyolk]

the docstring in docs which is referenced https://uplink.readthedocs.io/en/stable/dev/types.html?highlight=path#uplink.Path, and is different than what's in the quickstart: https://uplink.readthedocs.io/en/stable/user/quickstart.html#path-parameters

Changes proposed in this pull request:

• update docstring in arguments.py

Attention: @prkumar

[codecov]

Codecov Report

Merging #220 (a1b9e04) into master (d3ee283) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #220   +/-   ##
=======================================
  Coverage   99.91%   99.91%           
=======================================
  Files          44       44           
  Lines        2398     2398           
  Branches      182      182           
=======================================
  Hits         2396     2396           
  Misses          2        2           

Impacted Files	Coverage Δ
uplink/arguments.py	100.00% <ø> (ø)

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