chore(deps): update rust crate gray_matter to 0.3.0

[renovate]

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This PR contains the following updates:

Package	Type	Update	Change
gray_matter	build-dependencies	minor	0.2.6 -> 0.3.0

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Release Notes

the-alchemists-of-arland/gray-matter-rs (gray_matter)

v0.3.2

Breaking changes

• The Matter::parse_with_struct method has been removed. Instead, you can now use the parse method with
  a struct that implements the Deserialize trait from the serde crate.
• Expose gray_matter::Error to allow engine parsing errors to be handled by the user.

Enhancements

• Implement Deserializer for Pod. No json::Value conversion is needed anymore.

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Configuration

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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: Cargo.lock

Command failed: cargo update --config net.git-fetch-with-cli=true --manifest-path Cargo.toml --package [email protected] --precise 0.3.2
error: failed to acquire package cache lock

Caused by:
  failed to open: /home/ubuntu/.cargo/.package-cache

Caused by:
  failed to create directory `/home/ubuntu/.cargo`

Caused by:
  File exists (os error 17)