#6411: Update Rust ML ranking provider to 0.2.3
#6411: Update Rust ML ranking provider to 0.2.3

No major changes. A version file `version.txt` has been added to the metadata.

Undin/intellij-rust,Undin/intellij-rust,intellij-rust/intellij-rust,intellij-rust/intellij-rust,Undin/intellij-rust,intellij-rust/intellij-rust,intellij-rust/intellij-rust,Undin/intellij-rust,intellij-rust/intellij-rust,Undin/intellij-rust,intellij-rust/intellij-rust,Undin/intellij-rust