Bump govuk_publishing_components from 37.3.1 to 37.4.0 #2329

Job	Run time
test-ruby-matrix (4, 0)	2m 42s
test-ruby-matrix (4, 1)	3m 12s
test-ruby-matrix (4, 2)	1m 47s
test-ruby-matrix (4, 3)	2m 50s
CodeQL SAST scan / Analyze	1m 55s
SNYK security analysis / sast	10s
SNYK security analysis / sca	5s
Dependency Review scan / dependency-review-pr	8s
Dependency Review scan / dependency-review-push	0s
Lint JavaScript / Run Standardx	12s
Lint Ruby / Run RuboCop	22s
Lint SCSS / Run Stylelint	14s
Security Analysis / Run Brakeman	19s
Test JavaScript / Run Jasmine	51s
Test Ruby	1s
	14m 48s

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