feat: Update release-testing.yml (#361)

Author: aavinash-nr

.github/workflows/release-testing.yml

@@ -4,7 +4,7 @@ on:
   workflow_dispatch:
   push:
     branches:
-      - master 
+      - main 
 
 jobs:
   publish-layers:
@@ -67,4 +67,4 @@ jobs:
             -H "Content-Type: application/json" \
             -H "x-api-key: $API_KEY" \
             --data '{ "x86_layer_arn": "${{ needs.publish-layers.outputs.x86_arn }}", "arm_layer_arn": "${{ needs.publish-layers.outputs.arm_arn }}", "execution_phase": "warm" }' \
-            $API_URL
+            $API_URL