Undoing other uneeded changes

Author: Github Executorch

.github/workflows/trunk.yml

@@ -255,7 +255,7 @@ jobs:
         fi
 
         source .ci/scripts/utils.sh
-        install_executorch
+        install_executorch "--use-pt-pinned-commit"
         .ci/scripts/setup-arm-baremetal-tools.sh ${setup_script_args}
         source examples/arm/ethos-u-scratch/setup_path.sh