Add link to the v6 branch #5103

Job	Run time
Install	25s
Build Tests	55s
Lint	39s
typescript@4.8	46s
Default Tests	1m 0s
typescript@4.9	49s
typescript@5.0	52s
typescript@5.1	53s
Measure Asset Sizes	34s
Floating Deps Test	1m 31s
typescript@5.2	47s
Publish Docs to Cloudflare Pages	52s
Post Preview URL as comment to PR	29s
ember-3.28	1m 14s
w/ test-app-ember-concurrency-2	1m 0s
ember-4.0.0	1m 29s
w/ test-app-ember-concurrency-3	51s
ember-4.4	1m 23s
ember-4.8	1m 27s
ember-4.12	1m 36s
ember-release	1m 16s
ember-beta	1m 18s
ember-canary	1m 38s
embroider-safe	1m 15s
embroider-optimized	1m 11s
	26m 10s

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