Changes HashMap to use aHash instead, giving a performance boost. (#9391)

# Description

see https://github.com/nushell/nushell/issues/9390
using `ahash` instead of the default hasher. this will not affect
compile time as we where already building `ahash`.


# User-Facing Changes
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crates/nu-command/src/formats/to/html.rs

@@ -1,4 +1,5 @@
 use crate::formats::to::delimited::merge_descriptors;
+use ahash::{HashMap, HashMapExt};
 use fancy_regex::Regex;
 use nu_engine::CallExt;
 use nu_protocol::ast::Call;
@@ -9,7 +10,6 @@ use nu_protocol::{
 };
 use rust_embed::RustEmbed;
 use serde::{Deserialize, Serialize};
-use std::collections::HashMap;
 use std::error::Error;
 use std::fmt::Write;