Add micromamba to PATH #505

Job	Run time
no-environment	4s
environment-file	27s
no-environment-file	22s
bash (ubuntu-latest)	32s
cmd	1m 1s
bash (macos-latest)	1s
comment-in-environment-file	34s
bash (windows-latest)	1s
conda-lock	10s
create-args-multiple-spaces-1	27s
create-args-multiple-spaces-2	34s
custom-condarc	29s
env-variable	35s
micromamba-old-version-1	35s
micromamba-old-version-2	34s
micromamba-shell (ubuntu-latest)	24s
multiple-shell-init	41s
micromamba-shell (macos-latest)	1s
output-environment-path-custom-root-prefix	4s
output-environment-path-env-file	29s
output-environment-path-env-name-overwrite	25s
output-no-environment-path	8s
powershell (ubuntu-latest)	27s
powershell (macos-latest)	1s
powershell (windows-latest)	25s
	9m 31s

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