Add documentation for GA4 tracking #4240

Job	Run time
Dependency Review scan / dependency-review-pr	4s
Security Analysis / Run Brakeman	24s
CodeQL SAST scan / Analyze	1m 53s
Lint JavaScript / Run Standardx	18s
Lint Ruby / Run RuboCop	19s
Dependency Review scan / dependency-review-push	-1s
Lint Ruby / Run ErbLint	22s
Test JavaScript / Run Jasmine	38s
Test Ruby / Run Minitest	13m 50s
Lint SCSS / Run Stylelint	14s
Test Ruby / Run Minitest	13m 39s
Dependency Review scan / dependency-review-push	-1189s
Lint JavaScript / Run Standardx	18s
Lint SCSS / Run Stylelint	14s
CodeQL SAST scan / Analyze	1m 53s
Test JavaScript / Run Jasmine	38s
Dependency Review scan / dependency-review-pr	4s
Security Analysis / Run Brakeman	24s
Lint Ruby / Run RuboCop	19s
Lint Ruby / Run ErbLint	22s
Dependency Review scan / dependency-review-pr	4s
Test Ruby / Run Minitest	10m 41s
CodeQL SAST scan / Analyze	1m 53s
Security Analysis / Run Brakeman	24s
Lint Ruby / Run RuboCop	19s
Dependency Review scan / dependency-review-push	-514794s
Lint SCSS / Run Stylelint	14s
Lint Ruby / Run ErbLint	22s
Lint JavaScript / Run Standardx	18s
Test JavaScript / Run Jasmine	38s
	-512938s

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