fix: .github/llm: Add pull-request comment

Runs-on: ubuntu-latest
Signed-off-by: Jorge Marques <jorge.marques@analog.com>

Author: gastmaier

.github/workflows/llm.yml

@@ -246,7 +246,7 @@ jobs:
           rm -rf "$py_venv"
 
   pr-comment:
-    runs-on: [self-hosted, repo-only]
+    runs-on: ubuntu-latest
     needs: llm
     permissions:
       pull-requests: write