Update Day-12 Add dictionary

Author: abhijeetpandit7

Diff for: Section 1-12.ipynb

@@ -2011,7 +2011,8 @@
     "- New variables and functions inside another function is accesible within that function.  \n",
     "\n",
     "***Global Scope***  \n",
-    "- New variables defined at top-level is accesible within and outside function.  \n",
+    "- New variables defined at top-level is accesible within and outside function. \n",
+    "- Dictionary can be accessed or edited within functions also, unike variables.\n",
     "\n",
     "```python\n",
     "player_health = 10\n",