Checked other resources

• I added a very descriptive title to this issue.
• I searched the LangChain documentation with the integrated search.
• I used the GitHub search to find a similar question and didn't find it.
• I am sure that this is a bug in LangChain rather than my code.
• The bug is not resolved by updating to the latest stable version of LangChain (or the specific integration package).

Example Code

    template = ChatPromptTemplate.from_messages(
        messages= messages,
        template_format= "jinja2"
    )

Error Message and Stack Trace (if applicable)

Warning: Literal type does not include "jinja2".

Description

The from_messages method has a type error for the template_format parameter. When setting template_format to "jinja2", a warning is displayed even though "jinja2" works without any problem. It seems that "jinja2" is implemented internally, so the type definition should be modified to include it.

System Info

python-versions = "^3.11"