[DOCS] LTS Documentation has contradictory timeline

[captn3m0]

Describe the bug

The end of Extended maintenance for a given LTS release is documented two different ways at https://developer.hashicorp.com/vault/docs/enterprise/lts.

For a reader, reading that page, the End-of-Extended-Maintenance Date can be read two different ways:

End of Standard Maintenance + 1year

This is what the text implies.

After the first year, LTS Vault versions move from standard maintenance to extended maintenance for an additional year

End of Standard Maintenance + 3 major releases

This is what the table implies by penning down the date for 1.16 as "CY26 Q1 (1.22 release)".

While these two will likely match in normal cases, in case of a change in timeline for 1.22 (for any reason) - the dates can differ, resulting in ambiguity.

Expected behavior
The page should not have contradicting information. It might be simpler to just say "the latest 2 LTS releases are supported at any given time, following a N-1 policy. Since Vault releases 3 releases every year, this results in approximately 1 year of standard maintenance, followed by one year of extended maintenance".