Bump xxhash-rust from 0.8.10 to 0.8.12 (#2301)

* Bump xxhash-rust from 0.8.10 to 0.8.12

Bumps [xxhash-rust](https://github.com/DoumanAsh/xxhash-rust) from 0.8.10 to 0.8.12.
- [Commits](https://github.com/DoumanAsh/xxhash-rust/commits)

---
updated-dependencies:
- dependency-name: xxhash-rust
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

* Propagate feature `std` to `xxhash-rust`

---------

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Michael Mueller <[email protected]>

Author: dependabot[bot]

Cargo.lock

@@ -32,5 +32,6 @@ std = [
 	"scale-info/std",
 	"scale/std",
 	"scale-decode?/std",
-	"scale-encode?/std"
+	"scale-encode?/std",
+    "xxhash-rust/std"
 ]