Bump icu_datagen from 1.2.3 to 1.2.4 (#2871)

Bumps [icu_datagen](https://github.com/unicode-org/icu4x) from 1.2.3 to 1.2.4.
<details>
<summary>Commits</summary>
<ul>
<li><a href="83fe5df46e"><code>83fe5df</code></a> Remove cargo feature from clap; bump datagen to 1.2.4 (<a href="https://redirect.github.com/unicode-org/icu4x/issues/3388">#3388</a>)</li>
<li><a href="15fb5d0b7c"><code>15fb5d0</code></a> Remove <code>num_traits</code> dependency (<a href="https://redirect.github.com/unicode-org/icu4x/issues/3373">#3373</a>)</li>
<li><a href="48f850b69b"><code>48f850b</code></a> Bump tutorial lock file (<a href="https://redirect.github.com/unicode-org/icu4x/issues/3385">#3385</a>)</li>
<li><a href="995c3087f0"><code>995c308</code></a> Databake patch 0.1.5 (<a href="https://redirect.github.com/unicode-org/icu4x/issues/3374">#3374</a>)</li>
<li><a href="cccad51471"><code>cccad51</code></a> Fix name and link to icu_plurals crate in README (<a href="https://redirect.github.com/unicode-org/icu4x/issues/3381">#3381</a>)</li>
<li><a href="6125998ef3"><code>6125998</code></a> Remove JapaneseEraV1 bound from TypedZonedDateTimeFormatter; release icu_date...</li>
<li><a href="686ffd5a3e"><code>686ffd5</code></a> Publish icu_provider_fs 1.2.1 (<a href="https://redirect.github.com/unicode-org/icu4x/issues/3380">#3380</a>)</li>
<li><a href="ae4e38dee8"><code>ae4e38d</code></a> Do not autoenable postcard/use-std from provider-fs (<a href="https://redirect.github.com/unicode-org/icu4x/issues/3376">#3376</a>)</li>
<li><a href="be67197283"><code>be67197</code></a> chore: update CONTRIBUTING.md for new process (<a href="https://redirect.github.com/unicode-org/icu4x/issues/3366">#3366</a>)</li>
<li><a href="e50da6a72e"><code>e50da6a</code></a> Remove license-file when license is specified (<a href="https://redirect.github.com/unicode-org/icu4x/issues/3375">#3375</a>)</li>
<li>Additional commits viewable in <a href="https://github.com/unicode-org/icu4x/compare/ind/icu_datagen@1.2.3...ind/icu_datagen@1.2.4">compare view</a></li>
</ul>
</details>
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</details>

Cargo.lock

@@ -794,7 +794,6 @@ dependencies = [
  "anstyle",
  "bitflags 1.3.2",
  "clap_lex 0.4.1",
- "once_cell",
  "strsim",
 ]
 
@@ -1994,9 +1993,9 @@ dependencies = [
 
 [[package]]
 name = "icu_datagen"
-version = "1.2.3"
+version = "1.2.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3c20e7886449669257f4dfdad042b939a1a32ad618902a6b83936f7d9f7e8146"
+checksum = "4a9468f8e941739ba87b9b38e2f92bc88e5ee96d777ced1c769c5230032a53d5"
 dependencies = [
  "cached-path",
  "clap 4.2.4",

boa_icu_provider/Cargo.toml

@@ -19,7 +19,7 @@ icu_normalizer = "1.2.0"
 icu_properties = "1.2.0"
 zerovec = "0.9.4"
 
-icu_datagen = { version = "1.2.3", optional = true }
+icu_datagen = { version = "1.2.4", optional = true }
 icu_provider_blob = { version = "1.2.0", optional = true }
 icu_provider_adapters = { version = "1.2.0", features = ["serde"], optional = true }
 once_cell = { version = "1.17.1", default-features = false, features = [