Fix example match_documents fn table name, grammar (#3294)

ref
https://github.com/hwchase17/langchain/pull/3100#issuecomment-1517086472

Co-authored-by: Daniel Chalef <daniel.chalef@private.org>

docs/modules/indexes/vectorstores/examples/supabase.ipynb

@@ -1,6 +1,7 @@
 {
  "cells": [
   {
+   "attachments": {},
    "cell_type": "markdown",
    "id": "683953b3",
    "metadata": {},
@@ -35,7 +36,7 @@
     "               id bigint,\n",
     "               content text,\n",
     "               metadata jsonb,\n",
-    "               -- we return matched vectors to allow to execute maximal marginal relevance searches\n",
+    "               -- we return matched vectors to enable maximal marginal relevance searches\n",
     "               embedding vector(1536),\n",
     "               similarity float)\n",
     "           LANGUAGE plpgsql\n",
@@ -48,11 +49,11 @@
     "               content,\n",
     "               metadata,\n",
     "               embedding,\n",
-    "               1 -(docstore.embedding <=> query_embedding) AS similarity\n",
+    "               1 -(documents.embedding <=> query_embedding) AS similarity\n",
     "           FROM\n",
-    "               docstore\n",
+    "               documents\n",
     "           ORDER BY\n",
-    "               docstore.embedding <=> query_embedding\n",
+    "               documents.embedding <=> query_embedding\n",
     "           LIMIT match_count;\n",
     "       END;\n",
     "       $$;\n",
@@ -390,7 +391,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.9.1"
+   "version": "3.11.3"
   }
  },
  "nbformat": 4,