Update Rust crate scheduled-thread-pool to v0.2.6 (#4848)

Co-authored-by: Renovate Bot <bot@renovateapp.com>

Author: renovate[bot]

Cargo.lock

@@ -71,7 +71,7 @@ parking_lot = "=0.12.0"
 prometheus = { version = "=0.13.1", default-features = false }
 rand = "=0.8.5"
 reqwest = { version = "=0.11.10", features = ["blocking", "gzip", "json"] }
-scheduled-thread-pool = "=0.2.5"
+scheduled-thread-pool = "=0.2.6"
 semver = { version = "=1.0.9", features = ["serde"] }
 sentry = { version = "=0.24.3", features = ["tracing"] }
 sentry-conduit = { version = "=0.5.0", default-features = false }