Rust version policy: explain that newer versions should generally work

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

Author: ojeda

src/Rust-version-policy.md

@@ -8,6 +8,8 @@ The kernel documents the [minimal requirements](https://docs.kernel.org/process/
 
 The reason is that we cannot guarantee newer Rust versions will work due to the [unstable features](Unstable-features.md) in use. Removing the need for them is a priority in order to be able to eventually declare a minimum Rust version for the kernel.
 
+Having said that, generally speaking, newer versions should work, as long as one patches any potential compilation errors coming from changes in unstable features.
+
 ## Update policy
 
 ### Before a minimum version can be declared