fix: pin metadata-version to 2.3

[benieric]

Issue #, if available:

Description of changes:

• Twine does not yet support core-metadata-version 2.4 which is new default for hatchling. Pinning to unblock

Testing done:

root@b3e99f464864:/sagemaker-python-sdk# python3 -m twine check --strict dist/*
Checking dist/sagemaker-2.237.4.dev0-py3-none-any.whl: PASSED
Checking dist/sagemaker-2.237.4.dev0.tar.gz: PASSED
root@b3e99f464864:/sagemaker-python-sdk# git diff
diff --git a/pyproject.toml b/pyproject.toml
index 21eb1850..7711249c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -73,6 +73,7 @@ pattern = "(?P<version>.+)"
 [tool.hatch.metadata.hooks.custom]

 [tool.hatch.build.targets.wheel]
+core-metadata-version = "2.3"
 packages = ["src/sagemaker"]
 exclude = ["src/sagemaker/serve/model_server/triton/pack_conda_env.sh"]

@@ -80,6 +81,7 @@ exclude = ["src/sagemaker/serve/model_server/triton/pack_conda_env.sh"]
 "src/sagemaker/serve/model_server/triton/pack_conda_env.sh" = "pack_conda_env.sh"

 [tool.hatch.build.targets.sdist]
+core-metadata-version = "2.3"
 only-include = [
   "/requirements/extras",
   "/src",

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