CI: (deps): Bump pint from 0.25.3 to 0.26.1 in /ci

[dependabot]

Bumps pint from 0.25.3 to 0.26.1.

Changelog

Sourced from pint's changelog.

0.26.1 (2026-09-10)

• Fix UnitRegistry(system="imperial") returning US units instead of imperial ones for shared names like gallon or pint (#2408)
• Give UnitRegistry's magnitude type parameter a default, so ureg = UnitRegistry() needs no annotation (#2245)

0.26.0 (2026-09-10)

Version changes

• Drop support for Python 3.11 in favour of Python 3.14 (#2304)
• Bump minimum numpy version to 2.0.0

Major changes

• Allow string parsing of offset units (#386)
• Remove the ambiguous Nm alias from number_meter (Textile group), since it's commonly expected to mean newton-meter (torque) (#1966)
• Support *, /, +, and - between Quantity and datetime.timedelta, converting the timedelta to a Quantity in seconds (#2348)
• Accept strings in Quantity.to_preferred() and Quantity.ito_preferred() preferred unit lists (#2185)
• Allow UnitRegistry.wraps() to pass through arbitrary **kwargs without requiring a unit slot (#2175)
• Treat None as dimensionless destination units for Quantity.to() and Quantity.ito() (#2174)
• Add system parameter to to_base_units and ito_base_units to allow converting to the base units of a specific unit system (#2297)
• Quantity now converts datetime.timedelta objects to seconds or specified units when initializing a Quantity with a datetime.timedelta value. (#1978)
• Improve type annotations for Quantity (#2302, #2303)
• Improve type annotations for Quantity's __new__ and document support for arithmetic with datetime.timedelta introduced in #2348 at the typing level (#2373)

Formatting changes

• Add / unit modifier to pretty-print fractional exponents as a fraction (e.g. s**1.5 -> s³ᐟ²) (#60)
• Move SortFunc and the sort_by_* functions to the public pint.delegates.formatter module (#2086)
• Support the superscript decimal point ⋅ (U+22C5) and fraction slash ⸍ (U+2E0D) in unit exponents, e.g. gr⁰⋅³³³ (grain**0.333) and gr¹⸍³ (grain**(1/3)) (#2250)
• Prefer the Greek mu μ (U+03BC) over the micro sign µ (U+00B5) as the default symbol for the micro- prefix and micron, matching the Unicode standard's recommendation (#2177)
• Document how to control unit order in compound unit strings via default_sort_func and dim_order (#2086)
• Updated repr for various objects so that eval(repr(...)) works (#1495)
• Fix format specs with a width/fill/alignment (e.g. f"{q:20.1f}") not honoring the requested field width for quantities, because the width was applied only to the magnitude before the unit was appended. The width/fill/alignment now applies to the whole formatted quantity while sign/precision/type/zero-padding stay with the magnitude (#1798)
• Fix format_unit not respecting the ^ flag for negative powers on standalone Unit objects (e.g. format(Unit("second")**-1, "~^P") returning "1/s" instead of "s⁻¹") (#2313)
• Fix regression when using magnitude format specs in string formats (#2291)

Minor changes

• Add a "Try Pint in your browser" page to the docs with an in-browser JupyterLite console and notebook, requiring no local install (#2372)
• Switch CodSpeed CI benchmarks to simulation mode to fix a walltime environment warning.
• Document that instantiating Quantity from a (magnitude, unit) pair is significantly faster than from a string or by multiplying by a unit (#1873)
• Document registry preprocessors with an example for parsing non-standard square-unit spellings (#1211, #2062)
• Add beats per minute (beats_per_minute, bpm) (#2286)
• Document how custom duck array classes can register as upcast types and mark the public upcast type map as mutable (#2063)

... (truncated)

Commits

• 5a27ca2 Preparing for release 0.26.1
• 7b173b7 Give UnitRegistry's magnitude parameter a default (#2407)
• cf61c85 Fix UnitRegistry(system="imperial") returning US units (#2408)
• 848af34 Back to development: 0.26.1
• 059792c Preparing for release 0.26
• 7107f9f Prep for release 0.26
• 6fc0533 Document that Quantity(value, unit) beats string/multiply construction (#2384)
• bbc6b4c Add / unit modifier to pretty-print fractional exponents as a fraction (#2382)
• 0cb09dc Format negative magnitudes with the pretty exponent (#2371)
• d07ca63 Fix DimensionalityError from floating-point noise in fractional exponents (#2...
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