docs: Update gemini vector docs (#29841)

# Description

2 changes: 
1. removes get pass from the code example as it reads from stdio causing
a freeze to occur
2. updates to the latest gemini model in the example

---------

Co-authored-by: Chester Curme <chester.curme@gmail.com>

docs/docs/integrations/text_embedding/google_generative_ai.ipynb

@@ -78,7 +78,7 @@
    "source": [
     "from langchain_google_genai import GoogleGenerativeAIEmbeddings\n",
     "\n",
-    "embeddings = GoogleGenerativeAIEmbeddings(model=\"models/embedding-001\")\n",
+    "embeddings = GoogleGenerativeAIEmbeddings(model=\"models/text-embedding-004\")\n",
     "vector = embeddings.embed_query(\"hello, world!\")\n",
     "vector[:5]"
    ]