update language to be for lakes not rivers

notebooks/GIS/SWOTshp_CSVconversion.ipynb

@@ -67,7 +67,7 @@
    "metadata": {},
    "source": [
     "### Search for SWOT data\n",
-    "Let's start our search for River Vector Shapefiles in North America. SWOT files come in \"reach\" and \"node\" versions in the same collection, here we want the 10km reaches rather than the nodes. We will also only get files for North America, or 'NA' and can call out a specific pass number that we want. Each dataset has it's own shortname associate with it, for the SWOT River shapefiles, it is SWOT_L2_HR_RiverSP_2.0."
+    "Let's start our search for Lake Vector Shapefiles in North America. SWOT files come in \"Prior\", \"Obs\" or \"Unassigned\" versions in the same collection, here we want the Prior Lakes from the Prior Lake Database. We will also only get files for North America, or 'NA' and can call out a specific pass number that we want. Each dataset has it's own shortname associate with it, for the SWOT Lake shapefiles, it is SWOT_L2_HR_LakeSP_2.0."
    ]
   },
   {