Update spec.yaml to fix version metadata (#4165)

Author: sophies927

assets/models/system/phi-4-mini-instruct-generic-gpu/spec.yaml

@@ -1,6 +1,6 @@
 $schema: https://azuremlschemas.azureedge.net/latest/model.schema.json
 name: Phi-4-mini-instruct-generic-gpu
-version: v2
+version: 2
 path: ./
 tags:
   foundryLocal: ""
@@ -24,4 +24,4 @@ variantInfo:
     device: 'gpu'
     executionProvider: 'WebGPUExecutionProvider'
     fileSizeBytes: 3994319585
-    vRamFootprintBytes: 4020946899
+    vRamFootprintBytes: 4020946899