Document pnpm install's --no-lockfile option

[22a]

https://pnpm.io/cli/install doesn't currently list this option.

References:

• pnpm/pnpm/pkg-manager/plugin-commands-installation/src/install.ts#L122-L125
• pnpm/pnpm/pnpm/test/install/misc.ts#L50-L58

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[vercel]

@22a is attempting to deploy a commit to the pnpm Team on Vercel.

A member of the Team first needs to authorize it.

[zkochan]

It is documented here: https://pnpm.io/npmrc#lockfile

[mansona]

@zkochan I'm not sure but I think there might be a bit of confusion here 🤔 the --no-lockfile option that this PR is adding to the documentation is not documented on the url that you're linking to.

I mean I might have missed it but I did a "find in page" for --no-lockfile and I didn't see anything