Fix tool `get_sbml_model` #31

Job	Run time
Setup cache and determine changed repositories (3.7)	4m 43s
Lint Python scripts (3.7)	14s
Lint R scripts (ubuntu-20.04, release)	59s
Lint tool-list (3.7)	33s
Check file sizes	3s
Test tools (0, 3.7)	7m 25s
Combine chunked test results (3.7)	29s
Check workflow success	1s
Deploy	0s
Report deploy status	0s
	14m 27s

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