Make sure Easter egg substrings are not used as blog post slugs or ta… #2519

Job	Run time
check-file-patterns	5s
check-makefile (8.4)	9s
check-sri-macros-concat	4s
composer-validate (8.4)	7s
lint-php (8.4)	13s
composer-dependency-analyser (8.4)	8s
info (8.4)	9s
lint-latte (8.4)	11s
lint-xml	13s
lint-neon (8.4)	8s
phpcs (8.4)	14s
phpstan (8.4)	23s
phpstan-vendor (8.4)	1m 15s
psalm (8.3)	19s
tester (8.4)	35s
	4m 13s

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