Bump thiserror from 1.0.61 to 1.0.68 (#2294)

Bumps [thiserror](https://github.com/dtolnay/thiserror) from 1.0.61 to 1.0.68.
- [Release notes](https://github.com/dtolnay/thiserror/releases)
- [Commits](dtolnay/thiserror@1.0.61...1.0.68)

---
updated-dependencies:
- dependency-name: thiserror
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Cargo.lock

@@ -72,7 +72,7 @@ subxt-metadata = { version = "0.35.2" }
 subxt-signer = { version = "0.35.3" }
 syn = { version = "2" }
 synstructure = { version = "0.13.1" }
-thiserror = { version = "1.0.61" }
+thiserror = { version = "1.0.68" }
 tokio = { version = "1.41.0" }
 tracing = { version = "0.1.37" }
 tracing-subscriber = { version = "0.3.17" }