Mark opentelemetry-jaeger unmaintained (#2464)

Author: jayvdb

crates/opentelemetry-jaeger/RUSTSEC-0000-0000.md

@@ -0,0 +1,23 @@
+```toml
+[advisory]
+id = "RUSTSEC-0000-0000"
+package = "opentelemetry-jaeger"
+date = "2025-11-17"
+url = "https://crates.io/crates/opentelemetry-jaeger"
+informational = "unmaintained"
+
+[versions]
+patched = []
+```
+
+# opentelemetry-jaeger crate is unmaintained
+
+The `opentelemetry-jaeger` crate is deprecated and no longer actively maintained.
+
+The Jaeger propagator implementation has been migrated to
+[opentelemetry-jaeger-propagator](https://crates.io/crates/opentelemetry-jaeger-propagator).
+
+More information and examples of using OTLP with Jaeger can be found in
+[Introducing native support for OpenTelemetry in Jaeger](https://medium.com/jaegertracing/introducing-native-support-for-opentelemetry-in-jaeger-eb661be8183c)
+and
+[Exporting OTLP traces to Jaeger](https://github.com/open-telemetry/opentelemetry-rust/tree/main/examples/tracing-jaeger).