CompatHelper: bump compat for Nemo to 0.47, (keep existing compat) (#… #1756

Job	Run time
Documentation	6m 9s
Julia 1 - t=1 - ubuntu-latest - x64 - push	11m 42s
Julia 1 - t=5 - ubuntu-latest - x64 - push	16m 34s
Julia 1.9 - t=1 - ubuntu-latest - x64 - push	6m 51s
Julia 1.9 - t=5 - ubuntu-latest - x64 - push	11m 1s
Julia 1 - t=1 - macos-latest - aarch64 - push	10m 10s
Julia 1 - t=1 - macos-latest - x64 - push	15m 12s
Julia 1 - t=1 - windows-latest - x64 - push	17m 43s
	1h 35m 22s

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