Bump govuk_publishing_components from 47.0.0 to 51.0.0 #973

Job	Run time
Dependency Review scan / dependency-review-pr	5s
CodeQL SAST scan / Analyze	1m 29s
Lint JavaScript / Run Standardx	14s
Lint Ruby / Run RuboCop	19s
Lint SCSS / Run Stylelint	15s
Security Analysis / Run Brakeman	30s
Dependency Review scan / dependency-review-push	0s
Test Ruby / Run RSpec	53s
	3m 45s

Provide feedback