Use openapi.yaml instead of swagger.json in SwaggerUI

Change-Id: I0d84efbfdba8c7ffe9ecefc7114e2b161b2a785e
Signed-off-by: Claudio Mezzasalma <claudio.mezzasalma@eurotech.com>

docs/api/index.html

diff --git a/docs/api/index.html b/docs/api/index.html
index 4cd2894..83a5106 100644
--- a/docs/api/index.html
+++ b/docs/api/index.html
@@ -41,7 +41,7 @@
       var urlParams = new URLSearchParams(window.location.search);
       // Begin Swagger UI call region
       const ui = SwaggerUIBundle({
-        url: window.location.origin + "/kapua/docs/" + urlParams.get("version") + "/swagger.json",
+        url: window.location.origin + "/kapua/docs/" + urlParams.get("version") + "/openapi.yaml",
         dom_id: '#swagger-ui',
         deepLinking: true,
         presets: [