Update apiDefinition.swagger.json as asked by MSFT (#2672)

Added response to the code

Author: VikrantUpadhyay1

certified-connectors/HTML To PDF By Pascalcase/apiDefinition.swagger.json

@@ -22,12 +22,33 @@
   "paths": {
     "/": {
       "post": {
-        "responses": {
-          "default": {
-            "description": "default",
-            "schema": {}
-          }
-        },
+  "responses": {
+    "200": {
+      "description": "OK",
+      "schema": {
+        "title": "body",
+        "type":"string"
+      }
+    },
+    "400": {
+      "description": "Bad Request"
+    },
+    "404": {
+      "description": "Not Found"
+    },
+    "401": {
+      "description": "Unauthorized"
+    },
+    "403": {
+      "description": "Forbidden"
+    },
+    "500": {
+      "description": "Internal Server Error. Unknown error occurred"
+    },
+    "default": {
+      "description": "Operation Failed."
+    }
+  },
         "summary": "Convert HTML To PDF Pascalcase",
         "description": "Converts HTML to PDF of more than 2mb",
         "operationId": "ConvertHTMLToPDF",
@@ -87,4 +108,4 @@
   "securityDefinitions": {},
   "security": [],
   "tags": []
-}
+}