Update Rust crate minijinja to v2.6.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
minijinja	dependencies	minor	=2.5.0 -> =2.6.0

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Release Notes

mitsuhiko/minijinja (minijinja)

v2.6.0

Compare Source

• Added sum filter. #​648
• Added truncate filter to minijinja-contrib. #​647
• Added wordcount filter to minijinja-contrib. #​649
• Added wordwrap filter to minijinja-contrib. #​651
• Some tests and filters now pass borrowed values for performance reasons
  and a bug was fixed that caused undefined values in strict undefined
  mode not to work with tests. #​657
• Fixed an error reporting issue for some syntax errors. #​655
• Removed an unsafe code block from the Kwargs type internally
  which was probably unsafe. #​659
• Fix a regression with latest serde that caused internals to leak
  out when flattening on value handles is used. #​664
• Added Value::make_object_map to create projections from object
  into maps, similar to how it was already possible to create
  iterators that were projected from objects. #​663
• The |items filter will no longer allocate a list and instead
  return an iterator. #​665
• Fixed a bug that caused lstrip_blocks to act too eager. #​674

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