Bump postcss from 8.4.36 to 8.4.37 #2480

Job	Run time
test-ruby-matrix (4, 0)	3m 18s
test-ruby-matrix (4, 1)	2m 39s
test-ruby-matrix (4, 2)	3m 6s
test-ruby-matrix (4, 3)	2m 45s
CodeQL SAST scan / Analyze	1m 36s
Dependency Review scan / dependency-review-pr	11s
Dependency Review scan / dependency-review-push	0s
Lint JavaScript / Run Standardx	15s
Lint Ruby / Run RuboCop	25s
Lint SCSS / Run Stylelint	16s
Security Analysis / Run Brakeman	10s
SNYK security analysis / sast	13s
SNYK security analysis / sca	22s
Test JavaScript / Run Jasmine	26s
Test Ruby	1s
	15m 43s

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