[Fix] Fix setuptools-scm version resolution for rc tags (#22165)

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Co-authored-by: Baizhou Zhang <sobereddiezhang@gmail.com>

python/pyproject_npu.toml

@@ -146,4 +146,4 @@ exclude = [
 [tool.setuptools_scm]
 root = ".."
 version_file = "sglang/_version.py"
-git_describe_command = ["git", "describe", "--tags", "--long", "--match", "v*"]
+git_describe_command = ["python3", "python/tools/get_version_tag.py", "--tag-only"]