Fix expected output in graph query tutorials (#755)

Update expected results for "friends of friends not connected to Dave" exercise in Gremlin and openCypher tutorials to correctly show two results (Denise, Paras) instead of three.

Co-authored-by: Neel Shah <[email protected]>

Author: theneelshah

src/graph_notebook/notebooks/04-Language-Tutorials/01-Gremlin/01-Basic-Read-Queries.ipynb

@@ -1038,7 +1038,7 @@
     "\n",
     "* Find all the friends of friends that do not have a connection to Dave\n",
     "\n",
-    "The correct answer contains three results: \"Hank\", \"Denise\", \"Paras\""
+    "The correct answer contains two results: \"Denise\", \"Paras\""
    ]
   },
   {

src/graph_notebook/notebooks/04-Language-Tutorials/01-Gremlin/Gremlin-Exercises-Answer-Sheet.ipynb

@@ -128,7 +128,7 @@
     "\n",
     "* Find all the friends of friends that do not have a connection to Dave\n",
     "\n",
-    "The correct answer contains three results: \"Hank\", \"Denise\", \"Paras\""
+    "The correct answer contains two results: \"Denise\", \"Paras\""
    ]
   },
   {

src/graph_notebook/notebooks/04-Language-Tutorials/02-openCypher/01-Basic-Read-Queries.ipynb

@@ -839,7 +839,7 @@
     "\n",
     "* Find all the friends of friends that do not have a connection to Dave\n",
     "\n",
-    "The correct answer contains three results: \"Hank\", \"Denise\", \"Paras\""
+    "The correct answer contains two results: \"Denise\", \"Paras\""
    ]
   },
   {