docs: Rust session-limits example does not compile (SessionConfig::new does not exist)

[examon]

What

The Rust example in the "Configure a session limit" section of
docs/features/session-limits.md does not compile against the SDK it documents.
It calls SessionConfig::new(), but SessionConfig has no new associated
function -- it is constructed with SessionConfig::default() plus builder
methods. A reader who copies the snippet gets error[E0599].

Reproduce

Cargo.toml:

[dependencies]
github-copilot-sdk = "*"
tokio = { version = "1", features = ["full"] }

src/main.rs (the documented snippet, wrapped in the minimal main the guide implies):

use github_copilot_sdk::{
    Client, ClientOptions, ResumeSessionConfig, SessionConfig, SessionLimitsConfig,
};

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let client = Client::start(ClientOptions::default()).await?;

    let limits = SessionLimitsConfig { max_ai_credits: Some(30.0) };

    let session = client
        .create_session(
            SessionConfig::new()
                .approve_all_permissions()
                .with_session_limits(limits.clone()),
        )
        .await?;

    let resumed = client
        .resume_session(
            ResumeSessionConfig::new(session.id().clone())
                .approve_all_permissions()
                .with_session_limits(limits),
        )
        .await?;
    let _ = resumed;
    Ok(())
}

Run cargo build:

error[E0599]: no associated function or constant named `new` found for struct `SessionConfig` in the current scope
   |
   |             SessionConfig::new()
   |                            ^^^ associated function or constant not found in `SessionConfig`

Expected

The documented Rust snippet compiles against the SDK it ships with.

Actual

It fails to compile with the error[E0599] above at SessionConfig::new().
SessionConfig exposes Default (used throughout the crate) plus builder
methods; there is no SessionConfig::new. The sibling TypeScript, Go, Java, and
.NET tabs in the same section construct-then-configure, so the Rust tab is a
mistranslation. It went unnoticed because the block is marked
<!-- docs-validate: skip --> and Rust is not part of the doc-validation
language set, so CI never compiled it.

Environment

• github-copilot-sdk (Rust binding), current main
• rustc/cargo 1.97

[aszazs534]

**||✨ **> الدمام DAMMAM + الخبر KHOBAR + القطيف QATIF + سيهات SEIHAT + الجبيل Jubail |<((>0507028277 <))>✨||