chore: Add GraalPy in project.classifiers

Author: Apricot-S

pyproject.toml

@@ -18,6 +18,7 @@ classifiers = [
     "Programming Language :: Rust",
     "Programming Language :: Python :: Implementation :: CPython",
     "Programming Language :: Python :: Implementation :: PyPy",
+    "Programming Language :: Python :: Implementation :: GraalPy",
     "Programming Language :: Python :: 3 :: Only",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",