Typo in Stack vs Deque Method table in Deque specification

In the "Comparison of Stack and Deque methods" table in java.util.Deque specification, it incorrectly claims that `peek()` (returns null on empty) is equivalent to `getFirst()` (throws exception on empty), but in fact, it should be equivalent to `peekFirst()`, as 2 other places in the specification (in the "Comparison of Queue and Deque methods" table and the `peek()` method) claims.

The fix would be simple as to update the typo in the "stack" table.

Mailing list thread: https://mail.openjdk.org/pipermail/jdk-dev/2024-July/009258.html