chore(deps): bump opentelemetry-otlp from 0.27.0 to 0.31.0

Resolve merge conflict with main branch by updating opentelemetry
dependencies to match the versions in main:
- opentelemetry-otlp: 0.27.0 → 0.31.0
- opentelemetry_sdk: 0.29 → 0.31

Related to PR #1877

Co-authored-by: Ian Clarke <[email protected]>

Author: github-actions[bot]

crates/core/Cargo.toml

@@ -69,8 +69,8 @@ opentelemetry-jaeger = { features = ["collector_client", "isahc", "rt-tokio"], o
 tracing = { version = "0.1" }
 tracing-opentelemetry = { optional = true, version = "0.30.0" }
 tracing-subscriber = { optional = true, version = "0.3" }
-opentelemetry-otlp = { optional = true, version = "0.27.0" }
-opentelemetry_sdk = { optional = true, version = "0.29", features = ["rt-tokio"] }
+opentelemetry-otlp = { optional = true, version = "0.31.0" }
+opentelemetry_sdk = { optional = true, version = "0.31", features = ["rt-tokio"] }
 
 # internal deps
 freenet-stdlib = { features = ["net"], workspace = true }