Use netCDF-c v4.9.3 #360

Job	Run time
mpi-runner	1m 31s
rustfmt	35s
conda (ubuntu, conda-forge, stable)	59s
Address sanitizer	1m 25s
conda (windows, conda-forge, stable)	2m 35s
static builds (ubuntu-latest, stable)	1m 30s
conda (macos, conda-forge, stable)	51s
test apt (stable)	49s
test apt (beta)	40s
static builds (windows-latest, stable-msvc)	4m 46s
test apt (nightly)	39s
static builds (windows-latest, stable-gnu)	5m 6s
static builds (macos-12, stable)	3m 32s
static builds (macos-latest, stable)	1m 33s
	26m 31s

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