Update Rust crate toml to 0.8

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
toml	dependencies	minor	0.7 -> 0.8

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Release Notes

toml-rs/toml (toml)

v0.8.19

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v0.8.18

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v0.8.17

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v0.8.16

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v0.8.15

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v0.8.14

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v0.8.13

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v0.8.12

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v0.8.11

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v0.8.10

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v0.8.9

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v0.8.8

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v0.8.7

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v0.8.6

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v0.8.5

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v0.8.4

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v0.8.3

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v0.8.2

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v0.8.1

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v0.8.0

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Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

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• If you want to rebase/retry this PR, check this box

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[renovate]

⚠️ Artifact update problem

Renovate failed to update an artifact related to this branch. You probably do not want to merge this PR as-is.

♻ Renovate will retry this branch, including artifacts, only when one of the following happens:

• any of the package files in this branch needs updating, or
• the branch becomes conflicted, or
• you click the rebase/retry checkbox if found above, or
• you rename this PR's title to start with "rebase!" to trigger it manually

The artifact failure details are included below:

File name: demo-app/Cargo.lock

Command failed: cargo update --config net.git-fetch-with-cli=true --manifest-path demo-app/Cargo.toml --workspace
error: failed to get `renovate-bot-reproduction-recursive-submodules-sub2` as a dependency of package `renovate-bot-reproduction-recursive-submodules v0.1.0 (/tmp/renovate/repos/github/Josef-Reichardt/renovate-bot-reproduction-recursive-submodules/demo-app)`

Caused by:
  failed to load source for dependency `renovate-bot-reproduction-recursive-submodules-sub2`

Caused by:
  Unable to update /tmp/renovate/repos/github/Josef-Reichardt/renovate-bot-reproduction-recursive-submodules/renovate-bot-reproduction-recursive-submodules-sub1/renovate-bot-reproduction-recursive-submodules-sub2

Caused by:
  failed to read `/tmp/renovate/repos/github/Josef-Reichardt/renovate-bot-reproduction-recursive-submodules/renovate-bot-reproduction-recursive-submodules-sub1/renovate-bot-reproduction-recursive-submodules-sub2/Cargo.toml`

Caused by:
  No such file or directory (os error 2)