fixup doc link for release

Author: cmazakas

Cargo.lock

@@ -1,6 +1,6 @@
 [package]
 name = "axboe-liburing"
-version = "2.15.1"
+version = "2.15.2"
 edition = "2024"
 build = "liburing-rs/build.rs"
 description = "Low-level io_uring interface, transliterated from Jens Axboe's liburing."
@@ -9,7 +9,6 @@ repository = "https://github.com/cmazakas/liburing"
 readme = "liburing-rs/README.md"
 keywords = ["io_uring", "io-uring", "liburing", "linux-io", "async-io"]
 categories = ["asynchronous", "network-programming", "filesystem", "api-bindings"]
-documentation = "https://man.archlinux.org/listing/extra/liburing/"
 include = [
   "/src/arch",
   "/src/*.c",