build: upgrade ahash (#5851)

`cargo deny` was complaining the version 0.8.3 was yanked (for possible
DoS attack [wiki]), but the latest version (0.8.5) also includes aarch64
fixes which may or may not be relevant. Our usage of ahash limits to
proxy, but I don't think we are at any risk.

[wiki]: https://github.com/tkaitchuck/aHash/wiki/Yanked-versions

Cargo.lock

@@ -25,13 +25,14 @@ checksum = "f26201604c87b1e01bd3d98f8d5d9a8fcbb815e8cedb41ffccbeb4bf593a35fe"
 
 [[package]]
 name = "ahash"
-version = "0.8.3"
+version = "0.8.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2c99f64d1e06488f620f932677e24bc6e2897582980441ae90a671415bd7ec2f"
+checksum = "cd7d5a2cecb58716e47d67d5703a249964b14c7be1ec3cad3affc295b2d1c35d"
 dependencies = [
  "cfg-if",
  "once_cell",
  "version_check",
+ "zerocopy",
 ]
 
 [[package]]
@@ -6070,6 +6071,26 @@ dependencies = [
  "time",
 ]
 
+[[package]]
+name = "zerocopy"
+version = "0.7.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7a7af71d8643341260a65f89fa60c0eeaa907f34544d8f6d9b0df72f069b5e74"
+dependencies = [
+ "zerocopy-derive",
+]
+
+[[package]]
+name = "zerocopy-derive"
+version = "0.7.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9731702e2f0617ad526794ae28fbc6f6ca8849b5ba729666c2a5bc4b6ddee2cd"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.28",
+]
+
 [[package]]
 name = "zeroize"
 version = "1.6.0"