Add correct permissions for pull-validate-kaniko-build-config workflow (

#11266)

* Fix validaiton of kaniko config

* RUn workflwo on workflow change

.github/workflows/pull-validate-kaniko-build-config.yml

@@ -5,6 +5,11 @@ on:
     types: [opened, edited, synchronize, reopened, ready_for_review] 
     paths:
       - "configs/kaniko-build-config.yaml"
+      - ".github/workflows/pull-validate-kaniko-build-config.yaml"
+
+permissions:
+  id-token: write # This is required for requesting the JWT token
+  contents: read # This is required for actions/checkout
 
 jobs:
   validate-config: