Bump webmock from 3.20.0 to 3.21.2 #2342

Job	Run time
test-ruby-matrix (4, 0)	2m 15s
test-ruby-matrix (4, 1)	4m 2s
test-ruby-matrix (4, 2)	1m 45s
test-ruby-matrix (4, 3)	1m 49s
Security Analysis / Run Brakeman	10s
CodeQL SAST scan / Analyze	1m 45s
Dependency Review scan / dependency-review-pr	6s
Dependency Review scan / dependency-review-push	0s
Lint JavaScript / Run Standardx	9s
Lint Ruby / Run RuboCop	12s
SNYK security analysis / sast	6s
Lint SCSS / Run Stylelint	31s
SNYK security analysis / sca	10s
Test JavaScript / Run Jasmine	20s
Test Ruby	1s
	13m 21s

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