--- re-building ‘gtfs2emis_emission_factor.Rmd’ using rmarkdown

processing vignette 'gtfs2emis_intro_vignette.Rmd' failed with diagnostics:

Vignette re-building failed.

Build process failed

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The following actions uses node12 which is deprecated and will be forced to run on node16: actions/checkout@v2, actions/cache@v2. For more info: https://github.blog/changelog/2023-06-13-github-actions-all-actions-will-run-on-node16-instead-of-node12-by-default/