fix classifier string

Author: ratt-priv-ci

setup.py

@@ -33,7 +33,7 @@ def readme():
       long_description = readme(),
       url='https://github.com/bennahugo/obzplan',
       classifiers=[
-        "Development Status :: 1 - Stable",
+        "Development Status :: 5 - Production/Stable",
         "Intended Audience :: Science/Research",
         "License :: OSI Approved :: GNU General Public License v3 (GPLv3)",
         "Operating System :: POSIX :: Linux",