Fix formatting of Python version constraint

Author: SpheMakh

pyproject.toml

@@ -21,7 +21,7 @@ packages = [
 include = ["stimela/cargo/cab/stimela_runscript"]
 
 [tool.poetry.dependencies]
-python = ">=3.9, <=3.13"
+python = ">=3.9,<=3.13"
 pytest = { version = "*", optional=true }
 flake8 = { version = "*", optional=true }
 pytest-cov = { version = "*", optional=true }