[Bug]: Wrong type definition for table.renderItem

### Code of conduct

- [x] I agree to follow this project's code of conduct.

### Impacted component(s)

sp-table

### Expected behavior

When implementing the renderItem property for a virtualized table, the type definition expects me to implement
```
(property) Table.renderItem: (item: Record, index: number) => TemplateResult
```
the example at contradicts this, showing the ```Array``` that I found to actually work, while the implementation provided [in the package](https://github.com/adobe/spectrum-web-components/blob/7651b7d2e4bfc80095ab3608fbf1472be07e29d3/packages/table/src/Table.ts#L79) uses the TemplateResult containing an entire row, including the sp-table-row elements.

I expect the documentation, the type hinting I get from editors like visual studio or zed, and the example in the package's own implementation to all match. Minimally, I expect the type hinting for editors to match what (empirically) appears to be expected.

### Actual behavior

It appears to work best when I actually return an ```Array``` where the array contains the cells that go in the row.

### Screenshots

_No response_

### What browsers are you seeing the problem in?

Chrome

### How can we reproduce this issue?

1. Go to '...'
2. Click on '....'
3. Scroll to '....'
4. Check console
5. See error

### Sample code or abstract reproduction which illustrates the problem

tsc shows a warning on [this line](https://github.com/lschierer/EvonyTKRTips/blob/3d0bba2e48449958d390aa97456c4eaf938e95e7/packages/greenwood/src/components/generals/GeneralsTable.ts#L65) of my project. I do not have a minimal reproduction set up at this time, and my project is a bit involved for a casual reproduction.

Note the table *does* work. It would just be a much easier developer experience if I wasn't fighting the linter.

### Severity

SEV 4

### Logs taken while reproducing problem

_No response_

Read packages/table/src/Table.ts around the renderItem definition and compare it with the virtualized-table sorting example in the component documentation. Reproduce the TypeScript warning using the linked GeneralsTable.ts usage if possible; done means the implementation, editor type hint, and documented example agree on the accepted renderItem return type.

Written by the indexing model from the issue text.