feat: [DevOps] Document Grounding spec update script

Author: CharlesDuboisSAP

.github/workflows/spec-update.yaml

@@ -84,8 +84,8 @@ jobs:
               FILE_PATH='core/src/main/resources/spec/aicore.yaml'
               ;;
             grounding)
-              # TODO
-              exit 1
+              API_URL="$API_BASE_URL/AI/rage-proxy-inference/blob/main/docs/public/business_api_hub/api_hub_merged_spec.yaml?ref=$REF"
+              FILE_PATH='core-services/document-grounding/src/main/resources/spec/grounding.yaml'
               ;;
             orchestration)
               API_URL="$API_BASE_URL/AI/llm-orchestration/contents/src/spec/api.yaml?ref=$REF"