docs: Update Consul compatibility matrix for 1.11 release.

[jrasell]

Links

Jira: https://hashicorp.atlassian.net/browse/NMD-757

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[tgross]

LGTM! We should check when Consul 1.22 is going GA though... they've got a RC out already so we might be able to update this to show that's out by the time we ship Nomad 1.11.0 GA

[aimeeu]

Last I heard, 10/24 is Consul GA release date.