Bump oj from 3.16.8 to 3.16.9 #18309

Job	Run time
Build	6m 38s
Tests (unit_shared, on, real_world)	8m 47s
Tests (unit_shared, off, real_world)	8m 23s
Lint (rubocop)	1m 51s
Deployment To Review v2	0s
Tests (unit_candidate-provider, on, real_world)	4m 57s
Lint (erblint)	2m 22s
Tests (unit_candidate-provider, off, real_world)	4m 41s
Tests (unit_support-referee-api, on, real_world)	4m 17s
Lint (brakeman)	1m 33s
Tests (unit_support-referee-api, off, real_world)	4m 14s
Lint (yarn_lint)	1m 8s
Tests (integration_shared, on, real_world)	3m 19s
Tests (integration_shared, off, real_world)	3m 1s
Tests (integration_provider, on, real_world)	3m 31s
Tests (integration_provider, off, real_world)	3m 27s
Tests (integration_candidate, on, real_world)	3m 53s
Tests (integration_candidate, off, real_world)	4m 14s
Report on flakey specs in pull request	5s
Parallel deployment before production v2	0s
Production deployment v2	0s
Sandbox deployment v2	0s
Merge dependabot	0s
	1h 10m 21s

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