fix(theme:yn): fix unable to select parameters

[cipchk]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/ng-alain/delon/blob/master/CONTRIBUTING.md#commit
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

[x] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Build related changes
[ ] CI related changes
[ ] Documentation content changes
[ ] Application (the showcase website) / infrastructure changes
[ ] Other... Please describe:

What is the current behavior?

Issue Number: N/A

What is the new behavior?

Does this PR introduce a breaking change?

[ ] Yes
[x] No

Other information

[cipchk]

Preview is ready!

[codecov]

Codecov Report

Merging #866 into master will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #866   +/-   ##
=======================================
  Coverage   97.42%   97.42%           
=======================================
  Files         233      233           
  Lines        6951     6951           
  Branches     1319     1319           
=======================================
  Hits         6772     6772           
  Misses        117      117           
  Partials       62       62           

Impacted Files	Coverage Δ
packages/theme/src/pipes/yn/yn.pipe.ts	100.00% <100.00%> (ø)

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