Update dependency ruff to ^0.8.6

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
ruff (source, changelog)	^0.8.5 -> ^0.8.6

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Release Notes

astral-sh/ruff (ruff)

v0.8.6

Compare Source

Preview features

• [format]: Preserve multiline implicit concatenated strings in docstring positions (#​15126)
• [ruff] Add rule to detect empty literal in deque call (RUF025) (#​15104)
• [ruff] Avoid reporting when ndigits is possibly negative (RUF057) (#​15234)

Rule changes

• [flake8-todos] remove issue code length restriction (TD003) (#​15175)
• [pyflakes] Ignore errors in @no_type_check string annotations (F722, F821) (#​15215)

CLI

• Show errors for attempted fixes only when passed --verbose (#​15237)

Bug fixes

• [ruff] Avoid syntax error when removing int over multiple lines (RUF046) (#​15230)
• [pyupgrade] Revert "Add all PEP-585 names to UP006 rule" (#​15250)

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