Update dependency monaco-editor to ^0.51.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
monaco-editor	^0.50.0 -> ^0.51.0

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Release Notes

microsoft/monaco-editor (monaco-editor)

### [`v0.51.0`](https://togithub.com/microsoft/monaco-editor/blob/HEAD/CHANGELOG.md#0510) [Compare Source](https://togithub.com/microsoft/monaco-editor/compare/v0.50.0...v0.51.0) - New fields `IEditorOptions.placeholder` and `IEditorOptions.compactMode` - New fields `IGotoLocationOptions.multipleTests` and `IGotoLocationOptions.alternativeTestsCommand` - New field `IInlineEditOptions.backgroundColoring` - New experimental field `IEditorOptions.experimental.useTrueInlineView` - New options `CommentThreadRevealOptions` for comments Contributions to `monaco-editor`: - [@​ScottCarda-MS (Scott Carda)](https://togithub.com/ScottCarda-MS): Update Q# Keywords [PR #​4586](https://togithub.com/microsoft/monaco-editor/pull/4586)

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