Exclude nodejs/scripts/ from Node.js SDK test triggers

Changes to development utility scripts (codegen, protocol version updates)
should not trigger the Node.js test suite, as they don't affect SDK runtime
code and the workflow fails on fork PRs that lack the COPILOT_HMAC_KEY secret.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: stephentoub

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

@@ -12,6 +12,7 @@ on:
       - 'nodejs/**'
       - 'test/**'
       - '.github/workflows/nodejs-sdk-tests.yml'
+      - '!nodejs/scripts/**'
       - '!**/*.md'
       - '!**/LICENSE*'
       - '!**/.gitignore'