docs: Update upgrade guide to reflect enterprise changes introduced in nomad-enterprise

[pkazmierczak]

This PR documents a change made in the enterprise version of nomad that addresses the following issue:

Issue

When a user tries to filter audit logs, they do so with a stanza that looks like the following:

audit {
  enabled = true

  filter "remove deletes" {
    type = "HTTPEvent"
    endpoints  = ["*"]
    stages = ["OperationComplete"]
    operations = ["DELETE"]
  }
}

When specifying both an "endpoint" and a "stage", the events with both matching a "endpoint" AND a matching "stage" will be filtered.

When specifying both an "endpoint" and an "operation" the events with both matching a "endpoint" AND a matching "operation" will be filtered.

When specifying both a "stage" and an "operation" the events with a matching a "stage" OR a matching "operation" will be filtered.

The "OR" logic with stages and operations is unexpected and doesn't allow customers to get specific on which events they want to filter. For instance the following use-case is impossible to achieve: "I want to filter out all OperationReceived events that have the DELETE verb".

[DerekStrickland]

[lgfa29]

Just need to fix the Nomad version. This will go out in 1.4.0 since it's a breaking change 👍

[github-actions]

Ember Asset Size action

As of 36bea82

Files that got Bigger 🚨:

File	raw	gzip
nomad-ui.js	+20 B	-10 B

Files that stayed the same size 🤷‍:

File	raw	gzip
vendor.js	0 B	0 B
nomad-ui.css	0 B	0 B
vendor.css	0 B	0 B

[github-actions]

Ember Test Audit comparison

	main	36bea82	change
passes	1410	1410	0
failures	0	0	0
flaky	0	0	0
duration	10m 14s 637ms	12m 02s 819ms	+1m 48s 182ms

[github-actions]

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