docs: update faq.rst missing query params section

[vgerak]

Reflect the current keep_blank_qs_values default value

Closes #1964

Summary of Changes

Change wording in FAQ, to reflect current default value

Related Issues

1964

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[codecov[bot]]

Codecov Report

Merging #1968 (7031ed7) into master (9a7aca2) will not change coverage. The diff coverage is n/a.

@@            Coverage Diff            @@
##            master     #1968   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           63        63           
  Lines         6621      6621           
  Branches      1067      1067           
=========================================
  Hits          6621      6621           

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