Add disclosure for hasbrown's borsh encoding (#2100)

* Add disclosure for hasbrown's borsh encoding

* Remove when hashbrown was patched

It's unclear with what version it will be and when it will be. I'd prefer to make this valid and file-able now than risk someone starting to use this functionality (which will make removing it more complicated).

* Update RUSTSEC-0000-0000.md

* Be more specific regarding affected

crates/hashbrown/RUSTSEC-0000-0000.md

@@ -0,0 +1,27 @@
+```toml
+[advisory]
+id = "RUSTSEC-0000-0000"
+package = "hashbrown"
+date = "2024-10-11"
+url = "https://github.com/rust-lang/hashbrown/issues/576"
+categories = []
+keywords = ["borsh"]
+
+[versions]
+patched = [">= 0.15.1"]
+unaffected = ["<= 0.14"]
+
+[affected]
+functions = { "hashbrown::HashMap::borsh_serialize" = ["=0.15.0"] }
+```
+
+# Borsh serialization of HashMap is non-canonical
+
+The borsh serialization of the HashMap did not follow the borsh specification.
+It potentially produced non-canonical encodings dependent on insertion order.
+It also did not perform canonicty checks on decoding.
+
+This can result in consensus splits and cause equivalent objects to be
+considered distinct.
+
+This was patched in 0.15.1.