Update thiserror requirement from 1.0.4 to 2.0.17

[dependabot[bot]]

Updates the requirements on thiserror to permit the latest version.

Release notes

Sourced from thiserror's releases.

2.0.17

• Use differently named __private module per patch release (#434)

Commits

• 72ae716 Release 2.0.17
• 599fdce Merge pull request #434 from dtolnay/private
• 9ec05f6 Use differently named __private module per patch release
• d2c492b Raise minimum tested compiler to rust 1.76
• fc3ab95 Opt in to generate-macro-expansion when building on docs.rs
• 819fe29 Update ui test suite to nightly-2025-09-12
• 259f48c Enforce trybuild >= 1.0.108
• 470e6a6 Update ui test suite to nightly-2025-08-24
• 544e191 Update actions/checkout@v4 -> v5
• cbc1eba Delete duplicate cap-lints flag from build script
• Additional commits viewable in compare view

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