test: added manual trigger to test workflow

Author: Maikol

.github/workflows/build-availability-oracle.yml

@@ -6,6 +6,12 @@ on:
       - main
     tags:
       - 'v*'
+  workflow_dispatch:
+    inputs:
+      version:
+        description: 'Version tag to simulate (e.g., v1.0.0)'
+        required: false
+        type: string
 
 env:
   BASE_IMAGE: ghcr.io/graphprotocol/availability-oracle