pin "rack" gem to v2.2 #658

Job	Run time
test_matrix (3.1)	26s
test_matrix (3.2)	28s
test_matrix (3.3)	32s
CodeQL SAST scan / Analyze	1m 19s
Dependency Review scan / dependency-review-push	4s
Dependency Review scan / dependency-review-pr	0s
test	1s
generate_pacts	25s
asset_manager_pact / Verify pact tests	1m 6s
account_api_pact / Verify pact tests	1m 5s
email_alert_api_pact / Verify pact tests	1m 25s
collections_pact / Verify pact tests	1m 49s
frontend_pact / Verify pact tests	39s
link_checker_api_pact / Verify pact tests	1m 3s
locations_api_pact / Verify pact tests	1m 8s
places_manager_pact / Verify pact tests	1m 17s
publishing_api_pact / Verify pact tests	2m 17s
publish_pacts	15s
publish_gem	0s
	15m 19s

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