chore(deps): update dependency concurrently to v9 #2552

Job	Run time
Lint addon	35s
Tests - Floating Dependencies	47s
Tests	43s
Typecheck typescript@5.0	40s
Typecheck typescript@5.1	40s
Typecheck typescript@5.2	48s
Typecheck typescript@5.3	42s
Tests - ember-lts-3.28	1m 4s
Tests - ember-release	1m 12s
Tests - ember-beta	1m 6s
Tests - ember-canary	1m 10s
Tests - embroider-safe	1m 9s
Tests - embroider-optimized	55s
	11m 31s

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