Restrict Rust CLI build job to non-forked repos

Added a condition to the "Rust SDK Bundled CLI Build" job in rust-sdk-tests.yml to ensure it only runs when the workflow is triggered from the main repository, preventing execution on forked repositories.

Author: IeuanWalker

.github/workflows/rust-sdk-tests.yml

@@ -120,6 +120,7 @@ jobs:
   # bundled-CLI release pipeline) hit them downstream.
   bundle:
     name: "Rust SDK Bundled CLI Build"
+    if: github.event.repository.fork == false
     env:
       CARGO_TERM_COLOR: always
       RUST_BACKTRACE: 1