chore: bump pinned Rust toolchain to 1.94.1

[xdustinface]

1.94.1 is the latest stable release.

The stricter unused-import detection in 1.94.1 flags use std::error::Error as StdError; in dash/src/lib.rs as unused under default features, since its only consumers in dash::consensus::serde are gated on #[cfg(feature = "serde")].

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Run ID: 9dcbd469-fcb6-4f68-8f9e-963a6e2b2b8d

📥 Commits

Reviewing files that changed from the base of the PR and between d4ff050 and 7e8ba41.

📒 Files selected for processing (2)

• dash/src/lib.rs
• rust-toolchain.toml

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch chore/bump-rust-toolchain-1-94-1

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 67.91%. Comparing base (2ff1f05) to head (7e8ba41).
⚠️ Report is 7 commits behind head on v0.42-dev.

Additional details and impacted files

@@              Coverage Diff              @@
##           v0.42-dev     #648      +/-   ##
=============================================
- Coverage      67.91%   67.91%   -0.01%     
=============================================
  Files            318      318              
  Lines          67829    67534     -295     
=============================================
- Hits           46069    45863     -206     
+ Misses         21760    21671      -89     

Flag	Coverage Δ
core	75.54% <ø> (+0.32%)	⬆️
ffi	37.53% <ø> (-1.71%)	⬇️
rpc	20.00% <ø> (+<0.01%)	⬆️
spv	85.83% <ø> (+0.61%)	⬆️
wallet	67.79% <ø> (+0.17%)	⬆️
see 110 files with indirect coverage changes