nit: Update e2e-workflow.yml

Signed-off-by: Ishaan Sehgal <[email protected]>

Author: ishaansehgal99

.github/workflows/e2e-workflow.yml

@@ -8,7 +8,7 @@ on:
         required: true
       node_provisioner:
         type: string
-        required: true
+        required: false
         default: gpuprovisioner
       tag:
         type: string