chore(deps): update rust crate indoc to v2

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
indoc	workspace.dependencies	major	1 → 2

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Release Notes

dtolnay/indoc (indoc)

v2.0.7

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• Support C-string literals indoc! {c"..."}, indoc! {cr"..."} (#​67)

v2.0.6

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• Documentation improvements

v2.0.5

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• Documentation improvements (#​62, thanks @​ilyagr)

v2.0.4

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• Fix handling of \r\n ending on first line (#​61, thanks @​PizzasBear)

v2.0.3

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• Documentation improvements

v2.0.2

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• Add no-alloc category to crates.io metadata

v2.0.1

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• Set html_root_url attribute

v2.0.0

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• Change handling of final newline at zero levels of indentation (#​55)
• Add concatdoc! macro (#​56)
• Raise oldest supported rustc to 1.56

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