docs(ci-github-actions): fix indent (#5700)
### Description
On the npm tab the indent looks right, but it seems to me that that
wasn't the case for the yarn and pnpm tabs. I think this fixes it! :)
I found out while C&P'ing the yarn one to use in a project.
### Testing Instructions
Build the docs and check that the indent looks good now for the yarn and
pnpm tabs.
