docs(rust): Fix typo on rust-script version (#2488)

### Description

Quick fix, there's not a 1.15.0 of `rust-script` so I'm guessing this is
the issue rather than the environment.

### QC

* [ ] The PR contains a test case for the changes or the changes are
already covered by an existing test case.
* [ ] The documentation (`docs/`) is updated to reflect the changes or
this is not necessary (e.g. if the change does neither modify the
language nor the behavior or functionalities of Snakemake).

docs/snakefiles/rules.rst

@@ -859,7 +859,7 @@ The ability to execute Rust scripts is facilitated by |rust-script|_.
 As such, the script must be a valid ``rust-script`` script and ``rust-script``
 (plus OpenSSL and a C compiler toolchain, provided by Conda packages ``openssl``, ``c-compiler``, ``pkg-config``)
 must be available in the environment the rule is run in.
-The minimum required ``rust-script`` version is 1.15.0, so in the example above, the contents of ``rust.yaml`` might look like this:
+The minimum required ``rust-script`` version is 0.15.0, so in the example above, the contents of ``rust.yaml`` might look like this:
 
 .. code-block:: yaml