Use netCDF-c v4.9.3 #371

Job	Run time
conda (ubuntu, conda-forge, stable)	57s
conda (windows, conda-forge, stable)	3m 48s
Address sanitizer	1m 28s
mpi-runner	1m 29s
rustfmt	32s
conda (macos, conda-forge, stable)	1m 44s
static builds (ubuntu-latest, stable)	1m 16s
test apt (stable)	44s
Spell checking (typos)	7s
static builds (windows-latest, stable-msvc)	5m 32s
test apt (beta)	41s
static builds (windows-latest, stable-gnu)	5m 12s
test apt (nightly)	43s
static builds (macos-12, stable)	3m 3s
static builds (macos-latest, stable)	1m 45s
	29m 1s

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