tp: Upgrade LRU to 0.12.3

Summary:
^

The list of breaking changes from the [changelog](https://github.com/jeromefroe/lru-rs/blob/master/CHANGELOG.md#v0120---2023-10-03) seems pretty inocuous, at the very least these are all things that would only show up as compilation failures

Reviewed By: capickett

Differential Revision: D57477039

fbshipit-source-id: 78e69ec12268f2504b5812c8dd0a904d91fc5908

eden/scm/lib/third-party/streampager/Cargo.toml

@@ -16,7 +16,7 @@ dirs = "2.0"
 enum_dispatch = "0.3.5"
 indexmap = { version = "2.2.6", features = ["arbitrary", "rayon", "serde"] }
 lazy_static = "1.4"
-lru = "0.11.1"
+lru = "0.12.3"
 memmap2 = "0.5.10"
 regex = "1.9.2"
 scopeguard = "1.0.0"