DEVX-7540: Applications API Updates

[superchilled]

This PR:

• Updates the comments for Applications#create and Applications#update in order to detail the new privacy parameter.

[codecov-commenter]

Codecov Report

Merging #294 (a3b8d94) into main (e456fd3) will not change coverage.
The diff coverage is n/a.

❗ Current head a3b8d94 differs from pull request most recent head 18fbb06. Consider uploading reports for the commit 18fbb06 to get more accurate results

@@           Coverage Diff           @@
##             main     #294   +/-   ##
=======================================
  Coverage   97.93%   97.93%           
=======================================
  Files         108      108           
  Lines        1988     1988           
=======================================
  Hits         1947     1947           
  Misses         41       41           

Files	Coverage Δ
lib/vonage/applications.rb	100.00% <ø> (ø)

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