Update Rust crate syn to v2.0.68 - autoclosed

[oxide-renovate]

This PR contains the following updates:

Package	Type	Update	Change
syn	workspace.dependencies	patch	2.0.64 -> 2.0.68

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Release Notes

dtolnay/syn (syn)

v2.0.68

Compare Source

• Improve panic location when parse_quote! parses invalid syntax (#​1690, thanks @​stepancheg)
• More efficient peek implementation for Group and Lifetime (#​1687)

v2.0.67

Compare Source

• Produce more accurate error message locations for errors located at the end of a nested group (#​1679, #​1680)
• Support peeking LitCStr in ParseStream::peek (#​1682)

v2.0.66

Compare Source

• Allow braced structs when parsing ExprLet (#​1671)

v2.0.65

Compare Source

• Optimize the implementation of Fold to compile faster (#​1666, #​1667, #​1668)

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Configuration

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

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This PR has been generated by Renovate Bot.

[oxide-renovate]

⚠️ Artifact update problem

Renovate failed to update artifacts 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 --workspace
error: failed to load manifest for workspace member `/tmp/renovate/repos/github/oxidecomputer/omicron/cockroach-admin`
referenced by workspace at `/tmp/renovate/repos/github/oxidecomputer/omicron/Cargo.toml`

Caused by:
  failed to load manifest for dependency `nexus-test-utils`

Caused by:
  failed to load manifest for dependency `nexus-db-queries`

Caused by:
  failed to load manifest for dependency `oximeter`

Caused by:
  failed to parse manifest at `/tmp/renovate/repos/github/oxidecomputer/omicron/oximeter/oximeter/Cargo.toml`

Caused by:
  error inheriting `float-ord` from workspace root manifest's `workspace.dependencies.float-ord`

Caused by:
  `dependency.float-ord` was not found in `workspace.dependencies`

File name: Cargo.toml

Command failed: tools/renovate-post-upgrade.sh
Error: 
   0: �[91mbuilding package graph failed�[0m
   1: �[91m`cargo metadata` execution failed�[0m
   2: �[91m`cargo metadata` exited with an error: error: failed to load manifest for workspace member `/tmp/renovate/repos/github/oxidecomputer/omicron/cockroach-admin`
      referenced by workspace at `/tmp/renovate/repos/github/oxidecomputer/omicron/Cargo.toml`

      Caused by:
        failed to load manifest for dependency `nexus-test-utils`

      Caused by:
        failed to load manifest for dependency `nexus-db-queries`

      Caused by:
        failed to load manifest for dependency `oximeter`

      Caused by:
        failed to parse manifest at `/tmp/renovate/repos/github/oxidecomputer/omicron/oximeter/oximeter/Cargo.toml`

      Caused by:
        error inheriting `float-ord` from workspace root manifest's `workspace.dependencies.float-ord`

      Caused by:
        `dependency.float-ord` was not found in `workspace.dependencies`
   2: �[0m

  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ BACKTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   1: �[32m__libc_start_main�[0m�[90m<unknown>�[0m
      at �[35m<unknown source file>�[0m:�[35m<unknown line>�[0m

Run with COLORBT_SHOW_HIDDEN=1 environment variable to disable frame filtering.
Run with RUST_BACKTRACE=full to include source snippets.