feat: Pin actions to hashes TDE-934 #642

Job	Run time
Test machine readable to human-readable date/time using Nix	36s
Test Sentinel-1 using Nix	52s
Lint content	1m 55s
Test Sentinel-2 using Nix	1m 9s
Test Sentinel-1 on macos-12, using Poetry with Python 3.8	10m 38s
Test Sentinel-2 on macos-12, using Poetry with Python 3.8	7m 21s
Test Sentinel-1 on macos-12, using Poetry with Python 3.11	10m 16s
Test Sentinel-2 on macos-12, using Poetry with Python 3.11	14m 52s
Test Sentinel-1 on ubuntu-22.04, using Poetry with Python 3.8	4m 16s
Test Sentinel-2 on ubuntu-22.04, using Poetry with Python 3.8	4m 30s
Test Sentinel-1 on ubuntu-22.04, using Poetry with Python 3.11	4m 8s
Test Sentinel-2 on ubuntu-22.04, using Poetry with Python 3.11	9m 26s
Test Sentinel-1 on windows-2022, using Poetry with Python 3.8	9m 0s
Test Sentinel-2 on windows-2022, using Poetry with Python 3.8	10m 7s
Test Sentinel-1 on windows-2022, using Poetry with Python 3.11	9m 0s
Test Sentinel-2 on windows-2022, using Poetry with Python 3.11	14m 18s
finalise	8s
	1h 52m 32s

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