Rust version policy: link to docs.kernel.org

docs.kernel.org had an issue that prevented releasing the latest versions,
so v6.11-rc1 was not there, and thus the Quick Start guide did not have
the new Distributions section.

Now that it is there, update the link.

Signed-off-by: Miguel Ojeda <ojeda@kernel.org>

Author: ojeda

src/Rust-version-policy.md

@@ -30,7 +30,7 @@ In addition, we support the toolchains distributed by Rust, installed via [`rust
 
 Finally, slim and fast LLVM+Rust toolchains are provided at [kernel.org](https://kernel.org/pub/tools/llvm/rust/).
 
-Please see the [Quick Start guide](https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/rust/quick-start.rst?h=v6.11-rc1) for details.
+Please see the [Quick Start guide](https://docs.kernel.org/rust/quick-start.html) for details.
 
 ## Minimum upgrade policy