fix: don't show url for non-public posts

[ictbeheer]

This prevents urls like https://example.com?p=42

[github-actions]

Coverage report for commit: 8e77a6e
File: coverage.xml

Cover ┌─────────────────────────┐ Freq.
   0% │ ███████████████████████ │ 73.3%
  10% │ ███░░░░░░░░░░░░░░░░░░░░ │  6.7%
  20% │ ░░░░░░░░░░░░░░░░░░░░░░░ │  0.0%
  30% │ ░░░░░░░░░░░░░░░░░░░░░░░ │  0.0%
  40% │ ███░░░░░░░░░░░░░░░░░░░░ │  6.7%
  50% │ ░░░░░░░░░░░░░░░░░░░░░░░ │  0.0%
  60% │ ░░░░░░░░░░░░░░░░░░░░░░░ │  0.0%
  70% │ ░░░░░░░░░░░░░░░░░░░░░░░ │  0.0%
  80% │ ░░░░░░░░░░░░░░░░░░░░░░░ │  0.0%
  90% │ ░░░░░░░░░░░░░░░░░░░░░░░ │  0.0%
 100% │ █████░░░░░░░░░░░░░░░░░░ │ 13.3%
      └─────────────────────────┘
 *Legend:* █ = Current Distribution 

Summary - Lines: 11.54% | Methods: 7.84%

Files	Lines	Methods	Branches
src/Attributes
Meta.php	-	-	100.00%
MetaPrefix.php	-	-	100.00%
TaxonomyPrefix.php	-	-	100.00%
Terms.php	-	-	100.00%
src/Contracts
PostDataInterface.php	100.00%	100.00%	100.00%
src/Enums
PostStatus.php	-	-	100.00%
src
ImageData.php	-	-	100.00%
PostData.php	9.82%	7.69%	100.00%
TermData.php	-	-	100.00%
UserData.php	-	-	100.00%
src/Mappers
PostPrefixMapper.php	-	-	100.00%
UserPrefixMapper.php	-	-	100.00%
src/Normalizers
WPPostNormalizer.php	-	-	100.00%
src/Providers
DataServiceProvider.php	100.00%	100.00%	100.00%
src/Traits
HasMeta.php	36.00%	-	100.00%

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[mvdhoek1]

Er faalt nog wel een phpstan test.