Change wording

python-intro/python-intro.ipynb

@@ -621,7 +621,7 @@
       "Variables\n",
       "---\n",
       "\n",
-      "* We can assign values to names (variables).\n",
+      "* We can use names to reference values (variables).\n",
       "* No need to declare them first or define the type."
      ]
     },