Add micromamba to PATH #349

Job	Run time
Test download cache 1/2 (windows-latest)	1m 51s
Test download cache 1/2 (ubuntu-latest)	36s
Test download cache 1/2 (macos-latest)	1m 5s
Test env cache with changing root path 1/2 (windows-latest)	1m 13s
Test env then download 1/2 (windows-latest)	1m 14s
Test env cache with changing root path 1/2 (ubuntu-latest)	33s
Test env then download 1/2 (ubuntu-latest)	31s
Test env cache with changing root path 1/2 (macos-latest)	1m 3s
Test env then download 1/2 (macos-latest)	49s
Test env cache 1/2 (windows-latest)	1m 35s
Test env cache 1/2 (ubuntu-latest)	31s
Test env cache 1/2 (macos-latest)	59s
Test download cache 2/2 (windows-latest)	1m 8s
Test download cache 2/2 (ubuntu-latest)	16s
Test download cache 2/2 (macos-latest)	41s
Test env cache with changing root path 2/2 (windows-latest)	1m 1s
Test env cache with changing root path 2/2 (ubuntu-latest)	29s
Test env cache with changing root path 2/2 (macos-latest)	56s
Test env then download 2/2 (windows-latest)	58s
Test env then download 2/2 (ubuntu-latest)	12s
Test env then download 2/2 (macos-latest)	15s
Test env cache 2/2 (windows-latest)	35s
Test env cache 2/2 (ubuntu-latest)	11s
Test env cache 2/2 (macos-latest)	15s
	18m 57s

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