Bump rocksdb-sys/lz4 from `d443718` to `4c9431e`

Bumps [rocksdb-sys/lz4](https://github.com/lz4/lz4) from `d443718` to `4c9431e`.
- [Release notes](https://github.com/lz4/lz4/releases)
- [Commits](d44371841a...4c9431e9af)

---
updated-dependencies:
- dependency-name: rocksdb-sys/lz4
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

rocksdb-sys/lz4

@@ -1 +1 @@
-Subproject commit d44371841a2f1728a3f36839fd4b7e872d0927d3
+Subproject commit 4c9431e9af596af0556e5da0ae99305bafb2b10b