Bump govuk_publishing_components from 35.21.0 to 35.21.3 #1049

Job	Run time
Security Analysis / Run Brakeman	23s
Lint Ruby / Run RuboCop	29s
Lint JavaScript / Run Standardx	20s
Lint SCSS / Run Stylelint	25s
Test JavaScript / Run Jasmine	1m 4s
Test Ruby / Run Minitest	5m 17s
	7m 58s

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