impr: add param example to readme

[jeniasaigak]

Describe the PR
Add example param details to the README.md.

Relation issue
#1119

Additional context
The support for the parameter was added at #1122, at scope of #1119, but there are no details about this flag at the README. To find this details, I was needed to look at the related issues, so I've decided to add this details to the README to simplify searches for others who may need this feature

[ubogdan]

LGTM

[codecov]

Codecov Report

Merging #1189 (9a1ae5a) into master (636f456) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1189   +/-   ##
=======================================
  Coverage   95.03%   95.03%           
=======================================
  Files          10       10           
  Lines        2557     2557           
=======================================
  Hits         2430     2430           
  Misses         69       69           
  Partials       58       58           

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 636f456...9a1ae5a. Read the comment docs.

[ubogdan]

@zmefz Thanks for your contribution.