Update nested pin

[delucchi-cmu]

astronomy-commons/lsdb#1216

At the advice of @hombit:

We highly recommend updating to nested-pandas>=0.6.7 or manually downgrading to fsspec<2025.12, especially if you see catalog read problems with LSDB

[github-actions]

Before [5a1ccd8]	After [b452858]	Ratio	Benchmark (Parameter)
41.0±0.4ms	41.7±0.7ms	1.02	benchmarks.time_open_midsize_catalog
126±1ms	127±0.7ms	1.01	benchmarks.time_test_alignment_even_sky
502±2ms	495±4ms	0.99	benchmarks.Suite.time_outer_pixel_alignment
42.3±0.3ms	41.3±0.5ms	0.98	benchmarks.Suite.time_pixel_tree_creation
258±4ms	252±2ms	0.98	benchmarks.time_open_large_catalog
259±2ms	253±2ms	0.98	benchmarks.time_small_cone_large_catalog
1.01±0.03ms	990±50μs	0.98	benchmarks.time_test_cone_filter_multiple_order
21.3±0.5ms	20.4±0.5ms	0.96	benchmarks.Suite.time_inner_pixel_alignment

Click here to view all benchmarks.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.51%. Comparing base (5a1ccd8) to head (af41b5d).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #629   +/-   ##
=======================================
  Coverage   93.51%   93.51%           
=======================================
  Files          50       50           
  Lines        2450     2450           
=======================================
  Hits         2291     2291           
  Misses        159      159           

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