Fix typing-extensions version constraint syntax

Author: thewtex

pyproject.toml

@@ -28,7 +28,7 @@ requires-python = ">=3.9"
 dependencies = [
     "numpy >=2.0.0",
     "xarray >=2022.3",
-    "typing-extensions>=4.10.0"]
+    "typing-extensions >=4.10.0"]
 
 [project.urls]
 Homepage = "https://github.com/xarray-contrib/xarray-dataclasses/"