fix: add table variant for require.git field in lakefile.toml schema

[maxwell3025]

This PR corrects the JSON Schema at src/lake/schemas/lakefile-toml-schema.json to allow the table variant of the require.git field in lakefile.toml as specified in the reference.

Closes #11535

[leanprover-community-bot]

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[maxwell3025]

I don't have the permissions necessary to add labels, but this should have the label changelog-server

[mhuisi]

I'm not sure if we really want the core test suite to depend on Taplo, which is apparently currently not being actively maintained anymore.
I'd be happy to have these tests in leanprover/vscode-lean4, though, which is after all also the actual component that depends on Taplo :-)

[maxwell3025]

Yeah, they also mentioned this on Zulip. Should lakefile-toml-schema.json be moved to vscode-lean4 instead? It seems like it would be awkward to have the tests and the component being tested in different repos.

[mhuisi]

Should lakefile-toml-schema.json be moved to vscode-lean4 instead?

I'd still keep it here.

It seems like it would be awkward to have the tests and the component being tested in different repos.

I maintain both, so I suspect that this will not be much of a problem in practice. We can revisit this later if it does turn out to be a problem.

[maxwell3025]

I've made a draft pull request at vscode-lean4.