relocate action

Author: denis-yuen

.github/workflows/validate.yaml

@@ -10,6 +10,6 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Validate OpenAPI definition
-        uses: char0n/swagger-editor-validate@v1
+        uses: swaggerexpert/swagger-editor-validate@v1
         with:
           definition-file: openapi/openapi.yaml