Use netCDF-c v4.9.3 #383

Job	Run time
mpi-runner	1m 34s
Address sanitizer	1m 21s
rustfmt	39s
conda (ubuntu, conda-forge, stable)	54s
conda (windows, conda-forge, stable)	3m 18s
static builds (ubuntu-latest, stable)	1m 18s
test apt (stable)	39s
conda (macos, conda-forge, stable)	1m 25s
Spell checking (typos)	5s
static builds (windows-latest, stable-msvc)	6m 49s
test apt (beta)	45s
static builds (windows-latest, stable-gnu)	5m 45s
test apt (nightly)	46s
static builds (macos-13, stable)	3m 43s
static builds (macos-latest, stable)	1m 19s
	30m 20s

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