fix paths

spec/updated/entity-operations-spec.json

 {
-  "openapi": "3.0.1",
+  "openapi": "3.0.3",
   "info": {
     "title": "NGSI-LD Entity Operations",
     "version": "0.1"
   },
   "components": {},
   "paths": {
-    "/entityOperations/create/": {
+    "/entityOperations/create": {
       "post": {
         "description": "Batch Entity creation",
         "operationId": "batchEntityCreation",
@@ -45,7 +45,7 @@
         }
       }
     },
-    "/entityOperations/update/": {
+    "/entityOperations/update": {
       "post": {
         "description": "Batch Entity update",
         "operationId": "batchEntityUpdate",
@@ -97,7 +97,7 @@
         }
       }
     },
-    "/entityOperations/upsert/": {
+    "/entityOperations/upsert": {
       "post": {
         "description": "Batch Entity upsert",
         "operationId": "batchEntityUpsert",
@@ -150,7 +150,7 @@
         }
       }
     },
-    "/entityOperations/delete/": {
+    "/entityOperations/delete": {
       "post": {
         "description": "Batch Entity delete",
         "operationId": "batchEntityDelete",