Update model name for mete-reference template

.github/workflows/gha_workflow_llama_stack_tests.yml

@@ -1,6 +1,9 @@
 name: "Run Llama-stack Tests"
 
 on:
+  push:
+    branches:
+      - 'main'
   pull_request_target:
     types: ["opened"]
     branches:

llama_stack/templates/meta-reference-gpu/meta_reference.py

@@ -81,7 +81,7 @@ def get_distribution_template() -> DistributionTemplate:
                 "Port for the Llama Stack distribution server",
             ),
             "INFERENCE_MODEL": (
-                "meta-llama/Llama-3.2-3B-Instruct",
+                "meta-llama/Llama3.2-3B-Instruct",
                 "Inference model loaded into the Meta Reference server",
             ),
             "INFERENCE_CHECKPOINT_DIR": (