feat: update for coord 1.4 and point tests at main branch

[beckermr]

This PR updates the submodule for Coord to point at the main branch.

[codspeed-hq]

CodSpeed Performance Report

Merging #110 will degrade performances by 11.78%

_{Comparing coord-submod (18ed77e) with main (b8b7387)}

Summary

⚡ 1 improvements
❌ 2 (👁 2) regressions
✅ 8 untouched benchmarks

Benchmarks breakdown

	Benchmark	main	coord-submod	Change
⚡	test_benchmarks_lanczos_interp[kval-no_conserve_dc-run]	647.5 µs	447.1 µs	+44.82%
👁	test_benchmarks_lanczos_interp[xval-conserve_dc-run]	779.8 µs	879.7 µs	-11.36%
👁	test_benchmarks_lanczos_interp[xval-no_conserve_dc-run]	732.9 µs	830.8 µs	-11.78%

[beckermr]

@ismael-mendoza this one is ready for review!

[ismael-mendoza]

thanks @beckermr will take a look sometime this afternoon

[ismael-mendoza]

LGTM