File bincode as unmaintained

Author: EthanPlant

crates/bincode/RUSTSEC-0000-0000.md

@@ -0,0 +1,20 @@
+```toml
+[advisory]
+id = "RUSTSEC-0000-0000"
+package = "bincode"
+date = "2025-12-16"
+url = "https://sr.ht/~stygianentity/bincode/"
+informational = "unmaintained"
+
+[versions]
+patched = []
+```
+
+Development on bincode has ceased permanently, and updates will only be made in the event of a CVE. Projects are encouraged to migrate to alternatives such as `postcard` if possible. If compatibilty with the bincode format is required, consider using `wincode`.
+
+## Alternatives
+
+- [wincode](https://crates.io/crates/wincode) - Bincode-compatible alternative
+- [postcard](https://crates.io/crates/postcard)
+- [rkyv](https://crates.io/crates/rkyv)
+- [bitcode](https://crates.io/crates/bitcode)