DOC: Update Google BigQuery Vector Search with new SQL filter feature introduce in langchain-google-community 1.0.9

[Freezaa9]

URL

https://python.langchain.com/v0.2/docs/integrations/vectorstores/google_bigquery_vector_search/

Checklist

• [X] I added a very descriptive title to this issue.
• [X] I included a link to the documentation page I am referring to (if applicable).

Issue with current documentation:

Missing SQL like filters, coming in next langchain-google-community 1.0.9 release

Idea or request for content:

Adding an example in the documentation

[Freezaa9]

PR: https://github.com/langchain-ai/langchain/pull/26184