ci(e2e): trigger on submodule-only PRs

Signed-off-by: Dorin Geman <dorin.geman@docker.com>

Author: doringeman

.github/workflows/e2e-test.yml

@@ -4,6 +4,9 @@ on:
   workflow_dispatch:
   pull_request:
     branches: [ main ]
+    paths:
+      - '**'
+      - 'llamacpp/native/vendor/llama.cpp'
   push:
     branches: [ main ]