fix: add description

setup.py

@@ -28,7 +28,7 @@
         "Sphinx>=6.1.3,<7",  # Documentation generator
         "sphinx_rtd_theme>=1.2.0,<2",  # Readthedocs.org theme
         "sphinxcontrib-napoleon>=0.7",  # Allow Google-style documentation
-        "sphinx-plausible>=0.1.2,<0.2",
+        "sphinx-plausible>=0.1.2,<0.2", # For analytics
         "shibuya",
     ],
     "release": [  # `release` GitHub Action job uses this