updating header

Author: negin513

intermediate/indexing/advanced-indexing.ipynb

@@ -190,7 +190,7 @@
     "\n",
     "But what if we would like to find the information from the nearest grid cell to a collection of specified points (for example, weather stations or tower data)?\n",
     "\n",
-    "## Vectorized or Pointwise Indexing in Xarray\n",
+    "## Pointwise Indexing in Xarray\n",
     "\n",
     "Like NumPy and pandas, Xarray supports indexing many array elements at once in a *vectorized* manner. \n",
     "\n",