Update dev-server-action pin for source builds.

Use the action commit that builds pinned livekit-server versions from inside the cloned Go module, so e2e CI can start the schema metadata server commit.

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: alan-george-lk

.github/workflows/tests.yml

@@ -219,7 +219,7 @@ jobs:
       - name: Start livekit-server
         if: matrix.e2e-testing
         id: livekit_server
-        uses: livekit/dev-server-action@43eb848f7b8d4990e58691cddd2850883edea65a
+        uses: livekit/dev-server-action@666f6ba3a8085d36aa9a8e8639ab5e2989ab7be0
         with:
           github-token: ${{ github.token }}
           version: a47e21b6cb945aabee88c98650366cef8cbf7a99