Fixed a typo in smart_llm prompt (#13052)

<!-- Thank you for contributing to LangChain!

Replace this entire comment with:
  - **Description:** a description of the change, 
  - **Issue:** the issue # it fixes (if applicable),
  - **Dependencies:** any dependencies required for this change,
- **Tag maintainer:** for a quicker response, tag the relevant
maintainer (see below),
- **Twitter handle:** we announce bigger features on Twitter. If your PR
gets announced, and you'd like a mention, we'll gladly shout you out!

Please make sure your PR is passing linting and testing before
submitting. Run `make format`, `make lint` and `make test` to check this
locally.

See contribution guidelines for more information on how to write/run
tests, lint, etc:

https://github.com/langchain-ai/langchain/blob/master/.github/CONTRIBUTING.md

If you're adding a new integration, please include:
1. a test for the integration, preferably unit tests that do not rely on
network access,
2. an example notebook showing its use. It lives in `docs/extras`
directory.

If no one reviews your PR within a few days, please @-mention one of
@baskaryan, @eyurtsev, @hwchase17.
 -->

libs/experimental/langchain_experimental/smart_llm/base.py

@@ -226,7 +226,7 @@ def get_prompt_strings(
                 (AIMessagePromptTemplate, "Critique: {critique}"),
                 (
                     HumanMessagePromptTemplate,
-                    "You are a resolved tasked with 1) finding which of "
+                    "You are a resolver tasked with 1) finding which of "
                     f"the {self.n_ideas} answer options the researcher thought was  "
                     "best,2) improving that answer and 3) printing the answer in full. "
                     "Don't output anything for step 1 or 2, only the full answer in 3. "