fish: update to 3.6.2.

fish 3.6.2 (released December 4, 2023)
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This release of fish contains a security fix for CVE-2023-49284, a minor security problem identified
in fish 3.6.1 and previous versions (thought to affect all released versions of fish).

fish uses certain Unicode non-characters internally for marking wildcards and expansions. It
incorrectly allowed these markers to be read on command substitution output, rather than
transforming them into a safe internal representation.

For example, ``echo \UFDD2HOME`` has the same output as ``echo $HOME``.

While this may cause unexpected behavior with direct input, this may become a minor security problem
if the output is being fed from an external program into a command substitution where this output
may not be expected.

(wiz)