Merge pull request #1038 from microsoft/feature/hidi-docker-rename

- renames hidi in accordance to naming policy of MCR

Author: baywet

.github/workflows/docker.yml

@@ -6,7 +6,7 @@ on:
     paths: ['src/Microsoft.OpenApi.Hidi/**', '.github/workflows/**']
 env:
   REGISTRY: msgraphprod.azurecr.io
-  IMAGE_NAME: public/hidi
+  IMAGE_NAME: public/openapi/hidi
 jobs:
   push_to_registry:
     environment: