Update acknowledgments.md

[ljhwang]

Adds link to CIG's acknowlegement page.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (30ae879) 93.55% compared to head (e3ab571) 93.55%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #589   +/-   ##
=======================================
  Coverage   93.55%   93.55%           
=======================================
  Files          92       92           
  Lines        6346     6346           
=======================================
  Hits         5937     5937           
  Misses        409      409           

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[github-actions]

Benchmark	Main	Feature	Difference (99.9% CI)
Slab interpolation simple none	1.026 ± 0.004 (s=412)	1.025 ± 0.004 (s=468)	-0.1% .. +0.0%
Slab interpolation curved simple none	1.021 ± 0.008 (s=430)	1.022 ± 0.008 (s=453)	-0.1% .. +0.2%
Spherical slab interpolation simple none	1.259 ± 0.004 (s=370)	1.261 ± 0.007 (s=347)	-0.0% .. +0.2%
Slab interpolation simple curved CMS	1.095 ± 0.004 (s=414)	1.096 ± 0.005 (s=410)	-0.1% .. +0.1%
Spherical slab interpolation simple CMS	1.857 ± 0.006 (s=235)	1.857 ± 0.007 (s=252)	-0.1% .. +0.1%
Spherical fault interpolation simple none	1.268 ± 0.005 (s=370)	1.268 ± 0.005 (s=342)	-0.1% .. +0.1%
Cartesian min max surface	2.378 ± 0.016 (s=194)	2.378 ± 0.016 (s=187)	-0.2% .. +0.2%
Spherical min max surface	7.349 ± 0.012 (s=67)	7.352 ± 0.017 (s=58)	-0.1% .. +0.2%