Update Obtain credentials using TokenLibrary.ipynb

Author: nirav2

Notebooks/Scala/Obtain credentials using TokenLibrary.ipynb

@@ -14,7 +14,7 @@
       "outputs": [],
       "metadata": {},
       "source": [
-        "// For latest documentation please run TokenLibrary.help() from Notebook\n\n\n",
+        "// For latest documentation please run TokenLibrary.help() from Notebook\n\n",
         "// By default Synapse uses AAD passthrough for authentication\n",
         "// TokenLibrary is invoked under the hood for obtaining AAD token and using it for\n",
         "// authenticating against the resource\n",