Rename index in import notebook

We're not using the term "bulk import" anymore, so this
PR renames th index from `pinecone-bulk-import1-1024-1`
to `pinecone-import1-1024-1`.

Author: jseldess

docs/pinecone-bulk-import.ipynb

@@ -1330,7 +1330,7 @@
         "# Define serverless specifications\n",
         "spec = ServerlessSpec(cloud=cloud, region=region)\n",
         "\n",
-        "index_name = \"pinecone-bulk-import1-1024-1\"\n",
+        "index_name = \"pinecone-import1-1024-1\"\n",
         "dimension = 1024\n",
         "\n",
         "# List all existing indexes\n",