Fix tool `get_sbml_model` #63

Job	Run time
Setup cache and determine changed repositories (3.7)	51s
Lint R scripts (ubuntu-20.04, release)	2m 8s
Lint tool-list (3.7)	30s
Lint Python scripts (3.7)	15s
Check file sizes	4s
Test tools (0, 3.7)	7m 26s
Combine chunked test results (3.7)	31s
Check workflow success	1s
Deploy	0s
Report deploy status	0s
	11m 46s

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