Use netCDF-c v4.9.3 #327

Job	Run time
conda (ubuntu, conda-forge, stable)	55s
rustfmt	44s
conda (windows, conda-forge, stable)	1m 44s
static builds (ubuntu-latest, stable)	1m 20s
test apt (stable)	43s
conda (macos, conda-forge, stable)	1m 1s
static builds (windows-latest, stable-msvc)	4m 43s
test apt (beta)	41s
Address sanitizer	1m 41s
static builds (windows-latest, stable-gnu)	4m 47s
test apt (nightly)	38s
mpi-runner	1m 51s
static builds (macos-12, stable)	3m 13s
static builds (macos-latest, stable)	1m 39s
	25m 40s

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