Add short flag -V for consistency with other rust tooling

[graemer957]

Minor change to add the -V short flag to rust-analyzer to bring it in-line with other rust tooling such as:

rustc -V

rustc 1.76.0 (07dca489a 2024-02-04)

rustup -V

rustup 1.26.0 (5af9b9484 2023-04-05)
info: This is the version for the rustup toolchain manager, not the rustc compiler.
info: The currently active `rustc` version is `rustc 1.76.0 (07dca489a 2024-02-04)`

cargo -V

cargo 1.76.0 (c84b36747 2024-01-18)

[lnicola]

Thanks!

@bors r+

[bors]

📌 Commit 30429f8 has been approved by lnicola

It is now in the queue for this repository.

[bors]

⌛ Testing commit 30429f8 with merge 4a8d0f7...

[bors]

☀️ Test successful - checks-actions
Approved by: lnicola
Pushing 4a8d0f7 to master...